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Umezu K, Kurata S, Takamori H, Numabe T, Hiradate Y, Hara K, Tanemura K. Characteristics and Possible Role of Bovine Sperm Head-to-Head Agglutination. Cells 2020; 9:cells9081865. [PMID: 32784858 PMCID: PMC7463926 DOI: 10.3390/cells9081865] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/17/2020] [Revised: 08/03/2020] [Accepted: 08/08/2020] [Indexed: 02/06/2023] Open
Abstract
Although sperm head-to-head agglutination has been reported in many mammalian species, the biological significance of this unique sperm–sperm interaction remains largely unknown. Here, we aimed to examine the functional characteristics of agglutinated bovine sperm to determine the possible role of sperm agglutination in the fertilization process. We initially examined temporal changes to the degree of head-to-head agglutination in culture, and found that bovine sperm agglutinated despite the lack of sperm agglutination inducers in medium. Sperm viability and motility were evaluated by SYBR14/PI and JC-1 staining, respectively, to identify the relationship between sperm agglutination and fertilizing ability. Agglutinated sperm had increased motility, viability, and intact mitochondrial function compared with unagglutinated sperm. Furthermore, we found that heparin significantly increased the percentage of unagglutinated sperm, but did not affect viability of both agglutinated and unagglutinated sperm, suggesting that sperm agglutination dictated the viability. In conclusion, agglutinated bovine sperm maintained viability and motility for a longer time than unagglutinated sperm. Thus, we propose that the head-to-head agglutination is a crucial sperm–sperm interaction to ensure the fertilizing ability of sperm.
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Affiliation(s)
- Kohei Umezu
- Laboratory of Animal Reproduction and Development, School of Agricultural Science, Tohoku University, Sendai, Miyagi 980-0845, Japan; (S.K.); (Y.H.); (K.H.)
- Correspondence: (K.U.); (K.T.); Tel.: +81-22-757-4307 (K.U.); +81-22-757-4305 (K.T.)
| | - Shouhei Kurata
- Laboratory of Animal Reproduction and Development, School of Agricultural Science, Tohoku University, Sendai, Miyagi 980-0845, Japan; (S.K.); (Y.H.); (K.H.)
| | - Hironori Takamori
- Miyagi Prefectural Livestock Experimental Station, Osaki, Miyagi 989-6445, Japan;
| | - Takashi Numabe
- Miyagi Agricultural Development Corporation, Sendai, Miyagi 981-0914, Japan;
| | - Yuuki Hiradate
- Laboratory of Animal Reproduction and Development, School of Agricultural Science, Tohoku University, Sendai, Miyagi 980-0845, Japan; (S.K.); (Y.H.); (K.H.)
| | - Kenshiro Hara
- Laboratory of Animal Reproduction and Development, School of Agricultural Science, Tohoku University, Sendai, Miyagi 980-0845, Japan; (S.K.); (Y.H.); (K.H.)
| | - Kentaro Tanemura
- Laboratory of Animal Reproduction and Development, School of Agricultural Science, Tohoku University, Sendai, Miyagi 980-0845, Japan; (S.K.); (Y.H.); (K.H.)
- Correspondence: (K.U.); (K.T.); Tel.: +81-22-757-4307 (K.U.); +81-22-757-4305 (K.T.)
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2
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Welke RW, Haralampiev I, Schröter F, Braun BC, Herrmann A, Sieben C, Müller P. Inhibition of influenza virus activity by the bovine seminal plasma protein PDC-109. EUROPEAN BIOPHYSICS JOURNAL: EBJ 2019; 48:503-511. [PMID: 31222413 DOI: 10.1007/s00249-019-01374-3] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/26/2018] [Revised: 03/12/2019] [Accepted: 06/09/2019] [Indexed: 12/19/2022]
Abstract
A number of viruses causing sexually transmissible diseases are transmitted via mammalian seminal plasma. Several components of seminal plasma have been shown to influence those viruses and their physiological impact. To unravel whether components of seminal plasma could affect viruses transmitted via other pathways, it was investigated here whether the bovine seminal plasma protein PDC-109, belonging to the Fn-type 2 protein family, influences the activity of influenza A viruses, used as a model for enveloped viruses. We found that PDC-109 inhibits the fusion of influenza virus with human erythrocyte membranes and leads to a decreased viral infection in MDCK cells. In the presence of the head group of the phospholipid phosphatidylcholine, phosphorylcholine, the inhibitory effect of PDC-109 was attenuated. This indicates that the impact of the protein is mainly caused by its binding to viral and to erythrocyte membranes thereby interfering with virus-cell binding. Our study underlines that Fn-type 2 proteins have to be considered as new antiviral components present in mammalian seminal plasma.
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Affiliation(s)
- Robert-William Welke
- Institute for Biology, Humboldt-Universität zu Berlin, Invalidenstr. 42, 10115, Berlin, Germany.,Department of Intracellular Proteolysis, Max Delbrück Center for Molecular Medicine, Robert-Rössle-Str. 10, 13125, Berlin, Germany
| | - Ivan Haralampiev
- Institute for Biology, Humboldt-Universität zu Berlin, Invalidenstr. 42, 10115, Berlin, Germany.,Department of Crystallography, Max Delbrück Center for Molecular Medicine, Robert-Rössle-Str. 10, 13125, Berlin, Germany
| | - Filip Schröter
- Leibniz Institute for Zoo and Wildlife Research, Alfred-Kowalke-Straße 17, 10315, Berlin, Germany.,Department of Cardiovascular Surgery, Heart Center Brandenburg, Brandenburg Medical School "Theodor-Fontane", Ladeburger Straße 17, 16321, Bernau, Germany
| | - Beate C Braun
- Leibniz Institute for Zoo and Wildlife Research, Alfred-Kowalke-Straße 17, 10315, Berlin, Germany
| | - Andreas Herrmann
- Institute for Biology, Humboldt-Universität zu Berlin, Invalidenstr. 42, 10115, Berlin, Germany
| | - Christian Sieben
- Institute for Biology, Humboldt-Universität zu Berlin, Invalidenstr. 42, 10115, Berlin, Germany. .,Laboratory for Experimental Biophysics, School of Basic Sciences, École Polytechnique Fédérale de Lausanne (EPFL), 1015, Lausanne, Switzerland.
| | - Peter Müller
- Institute for Biology, Humboldt-Universität zu Berlin, Invalidenstr. 42, 10115, Berlin, Germany.
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3
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Defaus S, Avilés M, Andreu D, Gutiérrez-Gallego R. Lectin-Binding Specificity of the Fertilization-Relevant Protein PDC-109 by Means of Surface Plasmon Resonance and Carbohydrate REcognition Domain EXcision-Mass Spectrometry. Int J Mol Sci 2018; 19:ijms19041076. [PMID: 29617298 PMCID: PMC5979539 DOI: 10.3390/ijms19041076] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/15/2018] [Revised: 03/20/2018] [Accepted: 03/31/2018] [Indexed: 12/18/2022] Open
Abstract
Seminal plasma proteins are relevant for sperm functionality and some appear responsible for establishing sperm interactions with the various environments along the female genital tract towards the oocyte. In recent years, research has focused on characterizing the role of these proteins in the context of reproductive biology, fertility diagnostics and treatment of related problems. Herein, we focus on the main protein of bovine seminal plasma, PDC-109 (BSP-A1/-A2), which by virtue of its lectin properties is involved in fertilization. By means of surface plasmon resonance, the interaction of PDC-109 with a panel of the most relevant glycosidic epitopes of mammals has been qualitatively and quantitatively characterized, and a higher affinity for carbohydrates containing fucose has been observed, in line with previous studies. Additionally, using the orthogonal technique of Carbohydrate REcognition Domain EXcision-Mass Spectrometry (CREDEX-MS), the recognition domain of the interaction complexes between PDC-109 and all fucosylated disaccharides [(Fuc-α1,(3,4,6)-GlcNAc)] has been defined, revealing the specific glycotope and the peptide domain likely to act as the PDC-109 carbohydrate binding site.
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Affiliation(s)
- Sira Defaus
- Department of Experimental and Health Sciences, Pompeu Fabra University, Barcelona Biomedical Research Park, 08003 Barcelona, Spain.
| | - Manuel Avilés
- Department of Cell Biology and Histology, School of Medicine, University of Murcia and IMIB-Arrixaca, Campus Mare Nostrum, 30071 Murcia, Spain.
| | - David Andreu
- Department of Experimental and Health Sciences, Pompeu Fabra University, Barcelona Biomedical Research Park, 08003 Barcelona, Spain.
| | - Ricardo Gutiérrez-Gallego
- Department of Experimental and Health Sciences, Pompeu Fabra University, Barcelona Biomedical Research Park, 08003 Barcelona, Spain.
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4
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Kumar DKV, Choi SH, Washicosky KJ, Eimer WA, Tucker S, Ghofrani J, Lefkowitz A, McColl G, Goldstein LE, Tanzi RE, Moir RD. Amyloid-β peptide protects against microbial infection in mouse and worm models of Alzheimer's disease. Sci Transl Med 2017; 8:340ra72. [PMID: 27225182 DOI: 10.1126/scitranslmed.aaf1059] [Citation(s) in RCA: 684] [Impact Index Per Article: 97.7] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2015] [Accepted: 05/10/2016] [Indexed: 12/19/2022]
Abstract
The amyloid-β peptide (Aβ) is a key protein in Alzheimer's disease (AD) pathology. We previously reported in vitro evidence suggesting that Aβ is an antimicrobial peptide. We present in vivo data showing that Aβ expression protects against fungal and bacterial infections in mouse, nematode, and cell culture models of AD. We show that Aβ oligomerization, a behavior traditionally viewed as intrinsically pathological, may be necessary for the antimicrobial activities of the peptide. Collectively, our data are consistent with a model in which soluble Aβ oligomers first bind to microbial cell wall carbohydrates via a heparin-binding domain. Developing protofibrils inhibited pathogen adhesion to host cells. Propagating β-amyloid fibrils mediate agglutination and eventual entrapment of unatttached microbes. Consistent with our model, Salmonella Typhimurium bacterial infection of the brains of transgenic 5XFAD mice resulted in rapid seeding and accelerated β-amyloid deposition, which closely colocalized with the invading bacteria. Our findings raise the intriguing possibility that β-amyloid may play a protective role in innate immunity and infectious or sterile inflammatory stimuli may drive amyloidosis. These data suggest a dual protective/damaging role for Aβ, as has been described for other antimicrobial peptides.
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Affiliation(s)
- Deepak Kumar Vijaya Kumar
- Genetics and Aging Research Unit, MassGeneral Institute for Neurodegenerative Disease, Department of Neurology, Massachusetts General Hospital and Harvard Medical School, Charlestown, MA 02129, USA
| | - Se Hoon Choi
- Genetics and Aging Research Unit, MassGeneral Institute for Neurodegenerative Disease, Department of Neurology, Massachusetts General Hospital and Harvard Medical School, Charlestown, MA 02129, USA
| | - Kevin J Washicosky
- Genetics and Aging Research Unit, MassGeneral Institute for Neurodegenerative Disease, Department of Neurology, Massachusetts General Hospital and Harvard Medical School, Charlestown, MA 02129, USA
| | - William A Eimer
- Genetics and Aging Research Unit, MassGeneral Institute for Neurodegenerative Disease, Department of Neurology, Massachusetts General Hospital and Harvard Medical School, Charlestown, MA 02129, USA
| | - Stephanie Tucker
- Genetics and Aging Research Unit, MassGeneral Institute for Neurodegenerative Disease, Department of Neurology, Massachusetts General Hospital and Harvard Medical School, Charlestown, MA 02129, USA
| | - Jessica Ghofrani
- Genetics and Aging Research Unit, MassGeneral Institute for Neurodegenerative Disease, Department of Neurology, Massachusetts General Hospital and Harvard Medical School, Charlestown, MA 02129, USA
| | - Aaron Lefkowitz
- Genetics and Aging Research Unit, MassGeneral Institute for Neurodegenerative Disease, Department of Neurology, Massachusetts General Hospital and Harvard Medical School, Charlestown, MA 02129, USA
| | - Gawain McColl
- The Florey Institute of Neuroscience and Mental Health, University of Melbourne, Parkville, Victoria 3052, Australia
| | - Lee E Goldstein
- Department of Psychiatry, Boston University, Boston, MA 02215, USA
| | - Rudolph E Tanzi
- Genetics and Aging Research Unit, MassGeneral Institute for Neurodegenerative Disease, Department of Neurology, Massachusetts General Hospital and Harvard Medical School, Charlestown, MA 02129, USA.
| | - Robert D Moir
- Genetics and Aging Research Unit, MassGeneral Institute for Neurodegenerative Disease, Department of Neurology, Massachusetts General Hospital and Harvard Medical School, Charlestown, MA 02129, USA.
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5
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Ardon F, Markello RD, Hu L, Deutsch ZI, Tung CK, Wu M, Suarez SS. Dynamics of Bovine Sperm Interaction with Epithelium Differ Between Oviductal Isthmus and Ampulla. Biol Reprod 2016; 95:90. [PMID: 27605344 PMCID: PMC5176364 DOI: 10.1095/biolreprod.116.140632] [Citation(s) in RCA: 46] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/28/2016] [Accepted: 09/01/2016] [Indexed: 11/04/2022] Open
Abstract
In mammals, many sperm that reach the oviduct are held in a reservoir by binding to epithelium. To leave the reservoir, sperm detach from the epithelium; however, they may bind and detach again as they ascend into the ampulla toward oocytes. In order to elucidate the nature of binding interactions along the oviduct, we compared the effects of bursts of strong fluid flow (as would be caused by oviductal contractions), heparin, and hyperactivation on detachment of bovine sperm bound in vitro to epithelium on intact folds of isthmic and ampullar mucosa. Intact folds of oviductal mucosa were used to represent the strong attachments of epithelial cells to each other and to underlying connective tissue that exist in vivo. Effects of heparin on binding were tested because heparin binds to the Binder of SPerm (BSP) proteins that attach sperm to oviductal epithelium. Sperm bound by their heads to beating cilia on both isthmic and ampullar epithelia and could not be detached by strong bursts of fluid flow. Addition of heparin immediately detached sperm from isthmic epithelium but not ampullar epithelium. Addition of 4-aminopyridine immediately stimulated hyperactivation of sperm but did not detach them from isthmic or ampullar epithelium unless added with heparin. These observations indicate that the nature of binding of sperm to ampullar epithelium differs from that of binding to isthmic epithelium; specifically, sperm bound to isthmic epithelium can be detached by heparin alone, while sperm bound to ampullar epithelium requires both heparin and hyperactivation to detach from the epithelium.
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Affiliation(s)
- Florencia Ardon
- Department of Biomedical Sciences, Cornell University, Ithaca, New York
| | - Ross D Markello
- Department of Biomedical Sciences, Cornell University, Ithaca, New York
| | - Lian Hu
- Department of Biomedical Sciences, Cornell University, Ithaca, New York Family Planning Research Institute, Huazhong University of Science and Technology, Wuhan, China
| | - Zarah I Deutsch
- Department of Biomedical Sciences, Cornell University, Ithaca, New York
| | - Chih-Kuan Tung
- Department of Biological and Environmental Engineering, Cornell University, Ithaca, New York
| | - Mingming Wu
- Department of Biological and Environmental Engineering, Cornell University, Ithaca, New York
| | - Susan S Suarez
- Department of Biomedical Sciences, Cornell University, Ithaca, New York
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6
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Plante G, Therien I, Lachance C, Leclerc P, Fan J, Manjunath P. Implication of the human Binder of SPerm Homolog 1 (BSPH1) protein in capacitation. Mol Hum Reprod 2014; 20:409-21. [DOI: 10.1093/molehr/gau006] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022] Open
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7
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Plante G, Fan J, Manjunath P. Murine Binder of SPerm Homolog 2 (BSPH2): The Black Sheep of the BSP Superfamily1. Biol Reprod 2014; 90:20. [DOI: 10.1095/biolreprod.113.114272] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022] Open
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8
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Hung PH, Suarez SS. Alterations to the bull sperm surface proteins that bind sperm to oviductal epithelium. Biol Reprod 2012; 87:88. [PMID: 22837481 DOI: 10.1095/biolreprod.112.099721] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/01/2022] Open
Abstract
Three Binder of SPerm proteins (BSP1, BSP3, BSP5) are secreted by bovine seminal vesicles into seminal plasma and adsorbed onto sperm. When sperm inseminated into the female reach the oviduct, the BSP proteins bind them to its epithelial lining, forming a sperm storage reservoir. Previously, we reported that binding of capacitated sperm to oviductal epithelium in vitro is lower than that of uncapacitated sperm and we proposed that reduced binding was due to loss of BSP proteins during capacitation. Because of differences in amino acid sequences, we predicted that each BSP would respond differently to capacitating conditions. To test whether all three BSP proteins were lost from sperm during capacitation and whether the kinetics of loss differed among the three BSP proteins, ejaculated bull sperm were incubated under various capacitating conditions, and then the amounts of BSP proteins remaining on the sperm were assayed by Western blotting. Capacitation was assayed by analysis of protein tyrosine phosphorylation. While loss of BSP1 was not detected, most of the BSP5 was lost from sperm during incubation in TALP medium, even without addition of the capacitation enhancers heparin and dbcAMP-IBMX. Surprisingly, a smaller molecular mass was detected by anti-BSP3 antibodies in extracts of incubated sperm. Its identity was confirmed as BSP3 by mass spectrometry, indicating that BSP3 undergoes modification on the sperm surface. These changes in the composition of BSP proteins on sperm could play a role in releasing sperm from the storage reservoir by modifying sperm interactions with the oviductal epithelium.
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Affiliation(s)
- Pei-hsuan Hung
- Department of Biomedical Sciences, College of Veterinary Medicine, Cornell University, Ithaca, New York 14853, USA
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9
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Sankhala RS, Damai RS, Anbazhagan V, Kumar CS, Bulusu G, Swamy MJ. Biophysical Investigations on the Interaction of the Major Bovine Seminal Plasma Protein, PDC-109, with Heparin. J Phys Chem B 2011; 115:12954-62. [DOI: 10.1021/jp203509r] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
| | - Rajani S. Damai
- School of Chemistry, University of Hyderabad, Hyderabad 500 046, India
| | - V. Anbazhagan
- School of Chemistry, University of Hyderabad, Hyderabad 500 046, India
| | - C. Sudheer Kumar
- School of Chemistry, University of Hyderabad, Hyderabad 500 046, India
| | - Gopalakrishnan Bulusu
- International Institute of Information Technology, Hyderabad 500032, India
- TCS Innovation Laboratories, Tata Consultancy Services, Hyderabad 500081, India
| | - Musti J. Swamy
- School of Chemistry, University of Hyderabad, Hyderabad 500 046, India
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10
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Lu CH, Lee RKK, Hwu YM, Chu SL, Chen YJ, Chang WC, Lin SP, Li SH. SERPINE2, a Serine Protease Inhibitor Extensively Expressed in Adult Male Mouse Reproductive Tissues, May Serve as a Murine Sperm Decapacitation Factor1. Biol Reprod 2011; 84:514-25. [DOI: 10.1095/biolreprod.110.085100] [Citation(s) in RCA: 46] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/01/2022] Open
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11
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Maňásková-Postlerová P, Davidová N, Jonáková V. Biochemical and binding characteristics of boar epididymal fluid proteins. J Chromatogr B Analyt Technol Biomed Life Sci 2010; 879:100-6. [PMID: 21163710 DOI: 10.1016/j.jchromb.2010.11.023] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/28/2010] [Revised: 11/11/2010] [Accepted: 11/22/2010] [Indexed: 10/18/2022]
Abstract
During the passage through the epididymis, testicular spermatozoa are directly exposed to epididymal fluid and undergo maturation. Proteins and glycoproteins of epididymal fluid may be adsorbed on the sperm surface and participate in the sperm maturation process, potentially in sperm capacitation, gamete recognition, binding and fusion. In present study, we separated proteins from boar epididymal fluid and tested their binding abilities. Boar epididymal fluid proteins were separated by size exclusion chromatography and by high-performance liquid chromatography with reverse phase (RP HPLC). The protein fractions were characterized by SDS-electrophoresis and the electrophoretic separated proteins after transfer to nitrocellulose membranes were tested for the interaction with biotin-labeled ligands: glycoproteins of zona pellucida (ZP), hyaluronic acid and heparin. Simultaneously, changes in the interaction of epididymal spermatozoa with biotin-labeled ligands after pre-incubation with epididymal fluid fractions were studied on microtiter plates by the ELBA (enzyme-linked binding assay) test. The affinity of some low-molecular-mass epididymal proteins (12-17 kDa and 23 kDa) to heparin and hyaluronic acid suggests their binding ability to oviductal proteoglycans of the porcine oviduct and a possible role during sperm capacitation. Epididymal proteins of 12-18 kDa interacted with ZP glycoproteins. One of them was identified as Crisp3-like protein. The method using microtiter plates showed the ability of epididymal fluid fractions to change the interaction of the epididymal sperm surface with biotin-labeled ligands (ZP glycoproteins, hyaluronic acid and heparin). These findings indicate that some epididymal fluid proteins are bound to the sperm surface during epididymal maturation and might play a role in the sperm capacitation or the sperm-zona pellucida binding.
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Affiliation(s)
- Pavla Maňásková-Postlerová
- Laboratory of Diagnostics for Reproductive Medicine, Institute of Biotechnology, Academy of Sciences of the Czech Republic, v.v.i., Vídeňská 1083, 142 20 Prague 4, Czech Republic.
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12
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Mendoza VL, Vachet RW. Probing protein structure by amino acid-specific covalent labeling and mass spectrometry. MASS SPECTROMETRY REVIEWS 2009; 28:785-815. [PMID: 19016300 PMCID: PMC2768138 DOI: 10.1002/mas.20203] [Citation(s) in RCA: 270] [Impact Index Per Article: 18.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/03/2023]
Abstract
For many years, amino acid-specific covalent labeling has been a valuable tool to study protein structure and protein interactions, especially for systems that are difficult to study by other means. These covalent labeling methods typically map protein structure and interactions by measuring the differential reactivity of amino acid side chains. The reactivity of amino acids in proteins generally depends on the accessibility of the side chain to the reagent, the inherent reactivity of the label and the reactivity of the amino acid side chain. Peptide mass mapping with ESI- or MALDI-MS and peptide sequencing with tandem MS are typically employed to identify modification sites to provide site-specific structural information. In this review, we describe the reagents that are most commonly used in these residue-specific modification reactions, details about the proper use of these covalent labeling reagents, and information about the specific biochemical problems that have been addressed with covalent labeling strategies.
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Affiliation(s)
- Vanessa Leah Mendoza
- Department of Chemistry, University of Massachusetts Amherst, Amherst, MA 01003, USA.
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13
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Proceedings of the 1st Congress of the DFG Graduate Seminar ‘Cell-Cell Interaction in Reproduction’ and 5th Dies Andrologicus Marburg, Germany: 25 November 2000. Andrologia 2009. [DOI: 10.1111/j.1439-0272.2001.tb01491.x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022] Open
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14
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Muiño-Blanco T, Pérez-Pé R, Cebrián-Pérez JA. Seminal Plasma Proteins and Sperm Resistance to Stress. Reprod Domest Anim 2008; 43 Suppl 4:18-31. [DOI: 10.1111/j.1439-0531.2008.01228.x] [Citation(s) in RCA: 97] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
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15
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Binding of bovine seminal plasma protein BSP-A1/-A2 to model membranes: Lipid specificity and effect of the temperature. BIOCHIMICA ET BIOPHYSICA ACTA-BIOMEMBRANES 2008; 1778:502-13. [DOI: 10.1016/j.bbamem.2007.10.025] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/15/2007] [Revised: 10/12/2007] [Accepted: 10/29/2007] [Indexed: 11/20/2022]
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16
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Ignotz GG, Cho MY, Suarez SS. Annexins Are Candidate Oviductal Receptors for Bovine Sperm Surface Proteins and Thus May Serve to Hold Bovine Sperm in the Oviductal Reservoir1. Biol Reprod 2007; 77:906-13. [PMID: 17715429 DOI: 10.1095/biolreprod.107.062505] [Citation(s) in RCA: 98] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/01/2022] Open
Abstract
The sperm of eutherian mammals are held in a storage reservoir in the caudal segment of the oviduct by binding to the mucosal epithelium. The reservoir serves to maintain the fertility of sperm during storage and to reduce the incidence of polyspermic fertilization. Bovine sperm bind to the epithelium via seminal vesicle secretory proteins in the bovine seminal plasma protein (BSP) family, namely, PDC109 (BSPA1/A2), BSPA3, and BSP30K, which coat the sperm head. Our objective was to identify the receptors for bull sperm on the oviductal epithelium. Proteins extracted from apical plasma membrane preparations of bovine oviductal epithelium were subjected to affinity purification using purified BSPs bound to corresponding antibodies conjugated to Protein A agarose beads. Oviductal protein bands of approximately 34 and 36 kDa were eluted by EGTA from the beads and identified by tandem mass spectrometry as annexins (ANXAs) 1, 2, 4, and 5. Subsequently, antibodies to each of the ANXAs were found to inhibit sperm binding to explants of oviductal epithelium. Anti-ANXA antibodies labeled the apical surfaces and cilia of the mucosal epithelium in sections of bovine oviduct. Western blots confirmed the presence of ANXAs in apical plasma membranes. Because fucose had been determined to be a critical component of the oviductal receptor, the ANXAs were immunoprecipitated from solubilized apical plasma membranes and were probed with Lotus tetragonolobus lectin to verify the presence of fucose. Thus, these ANXAs are strong candidates for the sperm receptors on bovine oviductal epithelium.
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Affiliation(s)
- George G Ignotz
- Department of Biomedical Sciences, Cornell University, Ithaca, New York 14853, USA
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17
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Hnízda A, Santrůcek J, Sanda M, Strohalm M, Kodícek M. Reactivity of histidine and lysine side-chains with diethylpyrocarbonate -- a method to identify surface exposed residues in proteins. ACTA ACUST UNITED AC 2007; 70:1091-7. [PMID: 17765977 DOI: 10.1016/j.jbbm.2007.07.004] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/07/2007] [Revised: 07/13/2007] [Accepted: 07/15/2007] [Indexed: 11/22/2022]
Abstract
The chemical modification of amino acid side-chains followed by mass spectrometric detection can reveal at least partial information about the 3-D structure of proteins. In this work we tested diethylpyrocarbonate, as a common histidyl modification agent, for this purpose. Appropriate conditions for the reaction and detection of modified amino acids were developed using angiotensin II as a model peptide. We studied the modification of several model proteins with a known spatial arrangement (insulin, cytochrome c, lysozyme and human serum albumin). Our results revealed that the surface accessibility of residues is a necessary, although in itself insufficient, condition for their reactivity; the microenvironment of side-chains and the dynamics of protein structure also affect the ability of residues to react. However the detection of modified residues can be taken as proof of their surface accessibility, and of direct contact with solvent molecules.
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Affiliation(s)
- Ales Hnízda
- Institute of Inherited Metabolic Disorders, 1st School of Medicine, Charles University, 128 00 Praha 2, Czech Republic
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18
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Liu X, Broshears WC, Reilly JP. Probing the structure and activity of trypsin with amidination. Anal Biochem 2007; 367:13-9. [PMID: 17560535 DOI: 10.1016/j.ab.2007.04.037] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/23/2005] [Revised: 02/23/2007] [Accepted: 04/20/2007] [Indexed: 11/23/2022]
Abstract
Trypsin reacts with S-methylisothiourea for 1 to 2 h and the number of primary amine sites at which covalent labeling occurs is determined by mass spectrometry. By digesting the amidinated trypsin and mass analyzing the proteolytic peptides the sites of reaction are determined. The addition of cytochrome c to a solution of amidinated trypsin enables the proteolytic activity and autolytic properties of the enzyme to be studied.
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Affiliation(s)
- Xiaohui Liu
- Department of Chemistry, Indiana University, 800 E. Kirkwood Avenue, Bloomington, IN 47405-7102, USA
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19
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Beardsley RL, Running WE, Reilly JP. Probing the structure of the Caulobacter crescentus ribosome with chemical labeling and mass spectrometry. J Proteome Res 2007; 5:2935-46. [PMID: 17081045 DOI: 10.1021/pr060170w] [Citation(s) in RCA: 30] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
The ribosomal proteins of Caulobacter crescentus were amidinated before and after disassembly of the organelle and the results analyzed by mass spectrometry. Comparison with structural information from previous X-ray crystal studies of other bacterial ribosomes provides insight about the C. crescentus ribosome. In total, 47 of the 54 proteins present in the ribosome of C. crescentus were detected after labeling. The extent of derivatization for each protein is strongly dependent on the solvent accessibility of its target residues. Proteins of the ribosome stalk, which are known to be largely solvent-accessible, were labeled quite extensively. In striking contrast, other proteins that are known to be highly shielded in their subunits were labeled at very few of their potential sites. Furthermore, evidence that protein L12 binds to the ribosome via its N-terminal domain is consistent with previous findings.
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Affiliation(s)
- Richard L Beardsley
- Department of Chemistry, Indiana University, Bloomington, Indiana 47405, USA
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20
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Suarez SS. Interactions of spermatozoa with the female reproductive tract: inspiration for assisted reproduction. Reprod Fertil Dev 2007; 19:103-10. [PMID: 17389139 DOI: 10.1071/rd06101] [Citation(s) in RCA: 82] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022] Open
Abstract
Artificial insemination with sexed semen, in vitro fertilisation and intracytoplasmic sperm injection have been used to reproduce animals, but often not as successfully as natural mating. Learning more about how spermatozoa normally interact with the female tract can provide inspiration for developing improvements in assisted reproduction. The present review focuses on Bos taurus, because more is known about this species than others. At coitus, bull spermatozoa are deposited into the anterior vagina, where they rapidly enter the cervix. Cervical mucus quickly filters out seminal plasma from spermatozoa, unlike most assisted reproduction protocols. Spermatozoa that reach the uterus may require certain cell surface proteins to swim through the uterotubal junction. Shortly after passing through the junction, most spermatozoa are trapped in a storage reservoir by binding to oviducal epithelium, in the case of cattle via bovine seminal plasma (BSP) proteins coating the sperm head. As ovulation approaches, spermatozoa capacitate and shed BSP proteins. This reduces sperm binding to the epithelium and releases them from storage. Motility hyperactivation assists spermatozoa in leaving the storage reservoir, swimming through oviducal mucus and the cumulus oophorus, and penetrating the oocyte zona pellucida. Chemotactically regulated switching between asymmetrical (i.e. hyperactivated) and symmetrical flagellar beating may also guide spermatozoa to the oocyte.
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Affiliation(s)
- S S Suarez
- Department of Biomedical Sciences, T5-002B Veterinary Research Tower, College of Veterinary Medicine, Cornell University, Ithaca, NY 14853, USA.
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21
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Jonáková V, Manásková P, Tichá M. Separation, characterization and identification of boar seminal plasma proteins. J Chromatogr B Analyt Technol Biomed Life Sci 2006; 849:307-14. [PMID: 17110178 DOI: 10.1016/j.jchromb.2006.10.054] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/15/2006] [Revised: 10/04/2006] [Accepted: 10/27/2006] [Indexed: 01/31/2023]
Abstract
Methods used for the isolation, separation and characterization of boar seminal plasma proteins are discussed, as well as techniques applied to study their binding properties. Attention is paid to interactions of these proteins with different types of saccharides and glycoconjugates, with membrane phospholipids, and to interactions between proteins. Boar seminal plasma contains different types of proteins: spermadhesins of the AQN and AWN families; DQH and PSP proteins belong to the most abundant. Some of these proteins are bound to the sperm surface during ejaculation and thus protein-coating layers of sperm are formed. Sperms coated with proteins participate in different types of interactions occurring in the course of the reproduction process, e.g. formation of the oviductal sperm reservoir, sperm capacitation, oocyte recognition and sperm binding to the oocyte.
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Affiliation(s)
- V Jonáková
- Institute of Molecular Genetics, Academy of Sciences of the Czech Republic, Flemingovo n. 2, 166 37 Prague 6, Czech Republic.
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22
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Gwathmey TM, Ignotz GG, Mueller JL, Manjunath P, Suarez SS. Bovine Seminal Plasma Proteins PDC-109, BSP-A3, and BSP-30-kDa Share Functional Roles in Storing Sperm in the Oviduct1. Biol Reprod 2006; 75:501-7. [PMID: 16790686 DOI: 10.1095/biolreprod.106.053306] [Citation(s) in RCA: 147] [Impact Index Per Article: 8.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/01/2022] Open
Abstract
On ejaculation, sperm become coated with proteins secreted by the male accessory sex glands. In the bull, these proteins consist predominantly of the bovine seminal plasma family of proteins (BSPs): PDC-109 (BSP-A1/-A2), BSP-A3, and BSP-30-kDa. PDC-109 plays a role in forming an oviductal sperm reservoir by enabling sperm to bind to oviductal epithelium. Because PDC-109 has high sequence identity with the other BSPs, we tested BSP-A3 and BSP-30-kDa for the capacity to bind sperm to oviductal epithelium. BSP-A3 and BSP-30-kDa each increased binding of epididymal sperm to epithelium and were as effective as PDC-109 in competitively inhibiting binding of ejaculated sperm. Because binding extends the motile life of sperm, BSPs were tested for the ability to maintain sperm motility. BSP-treated epididymal sperm incubated with plasma membrane vesicles from bovine oviductal epithelium maintained progressive motility longer than untreated sperm. To our knowledge, this is the first report of this protective effect of BSPs. Similarities in function among the BSPs were reflected in their three-dimensional structure, whereas surface maps of electrostatic potential indicated differences in binding affinities and kinetics. Such differences may provide sperm with greater adaptability to variations among females. Altogether, these results indicate that BSPs play a crucial role in fertilization by maintaining sperm motility during storage.
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Affiliation(s)
- TanYa M Gwathmey
- Department of Biomedical Sciences, College of Veterinary Medicine, Cornell University, Ithaca, New York 14853, USA
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23
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Campanero-Rhodes MA, Menéndez M, Saiz JL, Sanz L, Calvete JJ, Solís D. Zinc Ions Induce the Unfolding and Self-Association of Boar Spermadhesin PSP-I, a Protein with a Single CUB Domain Architecture, and Promote Its Binding to Heparin. Biochemistry 2006; 45:8227-35. [PMID: 16819821 DOI: 10.1021/bi052621g] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Spermadhesins are a family of seminal plasma proteins composed of a single CUB domain, which appear to be involved in various aspects of the fertilization process in pigs. PSP-I and PSP-II, the most abundant porcine spermadhesins, occur in seminal plasma as noncovalent heterodimers devoid of heparin-binding capability. Of note is the stability of this dimer, which is significantly affected by physiologically relevant conditions such as Zn2+ ions. Here, we show that PSP-I and PSP-II when separated appear to conserve the overall fold of the CUB domain observed in the crystal structure of the PSP-I/PSP-II heterodimer, as concluded from gel filtration, analytical ultracentrifugation, differential scanning calorimetry, and circular dichroism analyses. However, Zn2+ concentrations in the range of those found in boar seminal plasma induce the unfolding and self-association of PSP-I, apparently as a consequence of the exposure of hydrophobic core residues, whereas they have no effect on PSP-II. Remarkably, Zn2+-denatured and self-associated (but not structured monomeric) PSP-I is retained on a heparin column, resembling the behavior of free PSP-I and homologous spermadhesins of the heparin-binding fraction of boar seminal plasma, which also exhibit different aggregation states. Thus, the modulation of the structural organization and heparin-binding ability of PSP-I by Zn2+ might be a physiological phenomenon in seminal plasma.
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24
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Abstract
At coitus, human sperm are deposited into the anterior vagina, where, to avoid vaginal acid and immune responses, they quickly contact cervical mucus and enter the cervix. Cervical mucus filters out sperm with poor morphology and motility and as such only a minority of ejaculated sperm actually enter the cervix. In the uterus, muscular contractions may enhance passage of sperm through the uterine cavity. A few thousand sperm swim through the uterotubal junctions to reach the Fallopian tubes (uterine tubes, oviducts) where sperm are stored in a reservoir, or at least maintained in a fertile state, by interacting with endosalpingeal (oviductal) epithelium. As the time of ovulation approaches, sperm become capacitated and hyperactivated, which enables them to proceed towards the tubal ampulla. Sperm may be guided to the oocyte by a combination of thermotaxis and chemotaxis. Motility hyperactivation assists sperm in penetrating mucus in the tubes and the cumulus oophorus and zona pellucida of the oocyte, so that they may finally fuse with the oocyte plasma membrane. Knowledge of the biology of sperm transport can inspire improvements in artificial insemination, IVF, the diagnosis of infertility and the development of contraceptives.
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Affiliation(s)
- S S Suarez
- Department of Biomedical Sciences, College of Veterinary Medicine, Cornell University, Ithaca, NY 14853, USA.
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25
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Töpfer-Petersen E, Ekhlasi-Hundrieser M, Kirchhoff C, Leeb T, Sieme H. The role of stallion seminal proteins in fertilisation. Anim Reprod Sci 2005; 89:159-70. [PMID: 16125345 DOI: 10.1016/j.anireprosci.2005.06.018] [Citation(s) in RCA: 78] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
Abstract
Seminal plasma proteins are secretory proteins originating mainly from the epididymis and the accessory sex glands. They are involved in the remodelling of the sperm surface which occurs during sperm transit through the male genital tract and continues later at ejaculation. During this process, collectively called post-testicular sperm maturation, the spermatozoa acquire the ability to fertilise an egg. Seminal plasma proteins have been shown to contribute to early and central steps of the fertilisation sequence, e.g. the establishment of the oviductal sperm reservoir, modulation of capacitation and gamete interaction. The major equine seminal plasma proteins belong to three protein classes, which contain widely occurring protein modules. Fn-2 type proteins are characterised by two or four tandemly arranged Fn-2 modules and have been implicated in the modulation of sperm capacitation. Multiple members of the cysteine-rich secretory proteins (CRISP) have been identified in the male genital tract of a number of species. CRISP proteins have been shown to be involved in various functions related to sperm-oocyte fusion, innate host defense function and ion channel blockage. Spermadhesins occur only in ungulate species. Their carbohydrate- and zona pellucida-binding properties would suggest a role of these proteins in gamete recognition. The major proteins of equine seminal plasma have been isolated and characterised regarding their expression along the male genital tract, protein structure and their functions.
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Affiliation(s)
- Edda Töpfer-Petersen
- Institute of Reproductive Medicine, University of Veterinary Medicine Hannover, Bünteweg 15, 30559 Hannover, Germany.
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26
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Bergeron A, Villemure M, Lazure C, Manjunath P. Isolation and characterization of the major proteins of ram seminal plasma. Mol Reprod Dev 2005; 71:461-70. [PMID: 15892046 DOI: 10.1002/mrd.20310] [Citation(s) in RCA: 90] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
Mammalian seminal plasma contains among others, two major families of proteins, namely spermadhesins and those proteins that contain fibronectin type II domains. Spermadhesins are the major proteins of boar and stallion seminal plasma and homologous proteins have been identified in the bull. These proteins appear to be involved in capacitation and sperm-egg interaction. In bovine seminal plasma, proteins containing fibronectin type II domains are the major proteins and are designated BSP proteins. These proteins play a role in sperm capacitation. In this study, we present the isolation and characterization of the major proteins of ram seminal plasma. Precipitated proteins from Suffolk ram seminal plasma were loaded onto a gelatin-Agarose column. The unadsorbed (fraction A) and retarded proteins (fraction B) were removed by washing the column with phosphate buffered-saline and the adsorbed proteins (fraction C) were eluted with 5 M urea. SDS-PAGE of fraction B indicated the presence of a 15.5 kDa protein, which is the major protein of ram seminal plasma (approximately 45% of total protein by weight) and was identified as a spermadhesin by N-terminal sequencing. SDS-PAGE analysis of fraction C revealed the presence of four proteins, which represented approximately 20% of total ram seminal plasma proteins by weight, and were identified as proteins of the BSP family and named RSP proteins. These RSP proteins were designated RSP-15 kDa, RSP-16 kDa, RSP-22 kDa, and RSP-24 kDa. Only RSP-15 kDa and -16 kDa proteins cross-reacted with antibodies against BSP proteins. Ram spermadhesin and RSP proteins interact with heparin but only RSP proteins bind to hen's egg yolk low-density lipoprotein. In conclusion, spermadhesin is the major protein of ram seminal plasma and other major proteins belong to the BSP protein family.
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Affiliation(s)
- Annick Bergeron
- Maisonneuve-Rosemont Hospital, Guy-Bernier Research Center, Montreal, Quebec, Canada
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27
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Ekhlasi-Hundrieser M, Schäfer B, Kirchhoff C, Hess O, Bellair S, Müller P, Töpfer-Petersen E. Structural and molecular characterization of equine sperm-binding fibronectin-II module proteins. Mol Reprod Dev 2004; 70:45-57. [PMID: 15515052 DOI: 10.1002/mrd.20187] [Citation(s) in RCA: 37] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
Phospholipid-binding proteins in the male genital tract are characterized by differing numbers Fn-2 modules (B-domain) carrying N-terminal extensions (A-domain) of variable length. In the stallion, three different proteins were identified, SP-1, SP-2, and EQ-12. SP-1 and SP-2 of the AA'BB'- and ABB'-type, respectively, are major proteins of the seminal plasma. Here we report the cDNA sequences of SP-1, and of a new member of the SP-2 family (SPnew) and the partial characterization of their iso- and glycoforms. The phosphorylcholine (PC)-binding ability of the long Fn-2 protein, EQ-12, with four tandemly arranged Fn-2 modules was determined by PC-affinity chromatography. Expression patterns of EQ-12, and the SP-proteins were studied by means of RT-PCR, Northern blot analysis and immunological approaches indicating differential expression along the male reproductive tract. The vast majority of the short SP-1 and SP-2 proteins are produced by the ampulla whereas EQ-12 originates from the epididymis. Indirect immunofluorescence microscopy of sperm isolated from different regions of the epididymis and Western blot analysis indicate that both, the long and the short Fn-2 proteins associate to the sperm surface during post-testicular maturation. Sperm binding of Fn-2 proteins at the post-acrosome and midpiece was at first detected in the corpus epididymis. Enhanced fluorescence intensity after ejaculation point to an increased number of molecules bound to the sperm surface. The function of these proteins is discussed in regard to their structure-function relationships.
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Affiliation(s)
- Mahnaz Ekhlasi-Hundrieser
- Institute of Reproductive Medicine, School of Veterinary Medicine Hannover, Foundation, Hannover, Germany
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28
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Santrůcek J, Strohalm M, Kadlcík V, Hynek R, Kodícek M. Tyrosine residues modification studied by MALDI-TOF mass spectrometry. Biochem Biophys Res Commun 2004; 323:1151-6. [PMID: 15451417 DOI: 10.1016/j.bbrc.2004.08.214] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/16/2004] [Indexed: 11/17/2022]
Abstract
Amino acid residue-specific reactivity in proteins is of great current interest in structural biology as it provides information about solvent accessibility and reactivity of the residue and, consequently, about protein structure and possible interactions. In the work presented tyrosine residues of three model proteins with known spatial structure are modified with two tyrosine-specific reagents: tetranitromethane and iodine. Modified proteins were specifically digested by proteases and the mass of resulting peptide fragments was determined using matrix-assisted laser desorption/ionisation time-of-flight mass spectrometry. Our results show that there are only small differences in the extent of tyrosine residues modification by tetranitromethane and iodine. However, data dealing with accessibility of reactive residues obtained by chemical modifications are not completely identical with those obtained by nuclear magnetic resonance and X-ray crystallography. These interesting discrepancies can be caused by local molecular dynamics and/or by specific chemical structure of the residues surrounding.
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Affiliation(s)
- Jirí Santrůcek
- Department of Biochemistry and Microbiology, Institute of Chemical Technology, Technická 5, 16628 Prague 6, Czech Republic.
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Jelínková P, Ryšlavá H, Liberda J, Jonáková V, Tichá M. Aggregated Forms of Bull Seminal Plasma Proteins and Their Heparin-Binding Activity. ACTA ACUST UNITED AC 2004. [DOI: 10.1135/cccc20040616] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
Heparin-binding activity of bull seminal plasma proteins was shown to be dependent on their aggregation state. The protein fraction interacting with immobilized heparin was characterized by large polydispersity in the region of molecular weight of 60 000-10 000, while that not retained on the affinity carrier was present as aggregates with molecular weight >100 000. Components of heparin-binding and non-heparin-binding fractions were separated by RP HPLC (reversed-phase HPLC) and analyzed by SDS (sodium dodecyl sulfate) electrophoresis and N-terminal sequencing. Size exclusion chromatography of whole seminal plasma and heparin-binding proteins in the presence of D-fructose (as a component of seminal plasma) showed that the region of molecular weights of protein-associated forms was shifted to lower values. An increase of heparin-binding activity of bull proteins, as determined by ELBA (Enzyme-Linked Binding Assay), correlates with a decrease of their aggregation state. The modulation of the aggregation state of bull proteins by seminal plasma components and, in this way, also of their heparin-binding properties suggests possible mechanisms for capacitation mediated by these proteins.
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30
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Jonáková V, Tichá M. Boar Seminal Plasma Proteins and Their Binding Properties. A Review. ACTA ACUST UNITED AC 2004. [DOI: 10.1135/cccc20040461] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
Binding properties of a group of proteins isolated from boar seminal plasma and their role in the fertilization process are discussed. Boar seminal plasma contains different types of proteins: spermadhesins of AQN and AWN family, DQH and PSP proteins belong to the most abundant. Some of these proteins are bound to the sperm surface during ejaculation and thus protein-coating layers are formed. Sperms coated with proteins participate in different types of interactions in the following steps of the fertilization process: formation of oviductal sperm reservoir, sperm capacitation, oocyte recognition and sperm binding. Saccharide-based interactions of boar seminal plasma proteins play role in the binding of sperm to oviductal epithelium, in sperm capacitation and primary binding of sperm to zona pellucida. An interaction with phospholipid components is responsible for the protein adsorption to sperm membrane. Interactions between proteins participate in the arrangement and remodelling of sperm-coating layers. Study of boar seminal plasma proteins, their characterization and elucidation of their interactions will contribute to understanding the fertilization process. A review with 82 references.
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Manásková P, Balínová P, Kraus M, Tichá M, Jonáková V. Mutual Interactions of Boar Seminal Plasma Proteins Studied by Immunological and Chromatographic Methods. Am J Reprod Immunol 2003; 50:399-410. [PMID: 14750699 DOI: 10.1034/j.1600-0897.2003.00098.x] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022] Open
Abstract
PROBLEM Boar seminal plasma contains various types of proteins. Most of them belong to spermadhesins and some of them contain fibronectin type II domain. Almost all of these proteins are present under physiological conditions in aggregated forms differing in their relative molecular mass, composition, and binding properties. The study of mutual specific interactions between proteins of boar seminal plasma that could be involved in the formation of aggregated forms and most probably of sperm coating layers is the subject of our present communication. METHODS OF STUDY Aggregated forms of boar seminal plasma proteins separated by size exclusion chromatography were analysed by Reversed-phase High-performance Liquid Chromatography (RP HPLC), SDS-PAGE and immunochemical methods (ELISA and immunoblotting). Mutual interactions between proteins were investigated by size exclusion chromatography of a mixture of separated monomer proteins and affinity chromatography of boar seminal plasma on immobilized spermadhesins. RESULTS Composition of proteins that are adsorbed from boar seminal plasma to immobilized spermadhesins corresponds to that of aggregated forms found in seminal plasma. Mutual interactions between monomer forms observed by size exclusion chromatography are in good agreement with results of affinity chromatography. An existence of interactions between spermadhesins of the AQN and AWN families and the DQH sperm surface protein, as well as between proteins involved in the formation of heterodimer porcine seminal plasma I (PSP I)/PSP II was proved. CONCLUSION Mutual specific interactions between protein components of boar seminal plasma were shown. These interactions participate in the formation of aggregated forms of proteins in seminal plasma and probably also in the arrangement and remodelling of protein coating layers of sperm. Aggregation of seminal plasma proteins is probably an important phenomenon in the fertilization process.
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Affiliation(s)
- Pavla Manásková
- Institute of Molecular Genetics, Academy of Sciences of the Czech Republic, Flemingovo nám. 2, Prague 6, 166 37, Czech Republic.
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Wah DA, Fernández-Tornero C, Sanz L, Romero A, Calvete JJ. Sperm coating mechanism from the 1.8 A crystal structure of PDC-109-phosphorylcholine complex. Structure 2002; 10:505-14. [PMID: 11937055 DOI: 10.1016/s0969-2126(02)00751-7] [Citation(s) in RCA: 74] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Abstract
Bovine seminal plasma PDC-109 binds to sperm surface choline lipids and promotes sperm capacitation by stimulating the efflux of cholesterol and phospholipids. The structure of PDC-109 with bound phosphorylcholine was solved using MAD data of a single platinum site. Its two globular (40 x 50 x 20 A(3)) Fn2 domains are linked and clustered by a short polypeptide. The choline binding sites lie at the same face of the molecule. Phosphorylcholine binds to the Fn2 domains through a cation-pi interaction between the quaternary ammonium group and a core tryptophan, plus hydrogen bonding between hydroxyls of exposed tyrosines and the phosphate group. The structure of the PDC-109-oPC complex provides a structural ground for the sperm membrane-coating mechanism underlying PDC-109-induced capacitation.
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Affiliation(s)
- David A Wah
- Centro de Investigaciones Biológicas, CSIC, Madrid, Spain
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33
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Hearn MT. Physicochemical factors in polypeptide and protein purification and analysis by high-performance liquid chromatographic techniques: current status and challenges for the future. HANDBOOK OF BIOSEPARATIONS 2000. [DOI: 10.1016/s0149-6395(00)80050-1] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
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