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Sun Q, Jiang Y, Fan M, Zhang X, Xu H, Liao Z. Characterization of a novel shell matrix protein with vWA domain from Mytilus coruscus. Biosci Biotechnol Biochem 2020; 84:1629-1644. [PMID: 32314940 DOI: 10.1080/09168451.2020.1756735] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
Abstract
Mollusk shell is a product of biomineralization with excellent mechanical properties, and the shell matrix proteins (SMPs) have important functions in shell formation. A vWA domain-containing protein (VDCP) was identified from the shell of Mytilus coruscus as a novel shell matrix protein. The VDCP gene is expressed at a high level in specific locations in the mantle and adductor muscle. Recombinant VDCP (rVDCP) showed abilities to alter the morphology of both calcite and aragonite, induce the polymorph change of calcite, bind calcite, and decrease the crystallization rate of calcite. In addition, immunohistochemistry analyses revealed the specific location of VDCP in the mantle, the adductor muscle, and the myostracum layer of the shell. Furthermore, a pull-down analysis revealed eight protein interaction partners of VDCP in shell matrices and provided a possible protein-protein interaction network of VDCP in the shell.
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Affiliation(s)
- Qi Sun
- Laboratory of Marine Biology Protein Engineering, Marine Science and Technical College, Zhejiang Ocean University , Zhoushan City, Zhejiang, China
| | - Yuting Jiang
- Laboratory of Marine Biology Protein Engineering, Marine Science and Technical College, Zhejiang Ocean University , Zhoushan City, Zhejiang, China
| | - Meihua Fan
- Laboratory of Marine Biology Protein Engineering, Marine Science and Technical College, Zhejiang Ocean University , Zhoushan City, Zhejiang, China
| | - Xiaolin Zhang
- Laboratory of Marine Biology Protein Engineering, Marine Science and Technical College, Zhejiang Ocean University , Zhoushan City, Zhejiang, China
| | - Huanzhi Xu
- Laboratory of Marine Biology Protein Engineering, Marine Science and Technical College, Zhejiang Ocean University , Zhoushan City, Zhejiang, China
| | - Zhi Liao
- Laboratory of Marine Biology Protein Engineering, Marine Science and Technical College, Zhejiang Ocean University , Zhoushan City, Zhejiang, China
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Molecular characterization of a whirlin-like protein with biomineralization-related functions from the shell of Mytilus coruscus. PLoS One 2020; 15:e0231414. [PMID: 32267882 PMCID: PMC7141649 DOI: 10.1371/journal.pone.0231414] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/16/2020] [Accepted: 03/23/2020] [Indexed: 11/19/2022] Open
Abstract
Mollusc shells are produced from calcified skeletons and have excellent mechanical properties. Shell matrix proteins (SMPs) have important functions in shell formation. A 16.6 kDa whirlin-like protein (WLP) with a PDZ domain was identified in the shell of Mytilus coruscus as a novel SMP. In this study, the expression, function, and location of WLP were analysed. The WLP gene was highly expressed and specifically located in the adductor muscle and mantle. The expression of recombinant WLP (rWLP) was associated with morphological change, polymorphic change, binding ability, and crystallization rate inhibition of the calcium carbonate crystals in vitro. In addition, an anti-rWLP antibody was prepared, and the results from immunohistochemistry and immunofluorescence analyses revealed the specific location of the WLP in the mantle, adductor muscle, and myostracum layer of the shell, suggesting multiple functions for WLP in biomineralization, muscle-shell attachment, and muscle attraction. Furthermore, results from a pull-down analysis revealed 10 protein partners of WLP in the shell matrices and a possible network of interacting WLPs in the shell. In addition, in this study, one of the WLP partners, actin, was confirmed to have the ability to bind WLP. These results expand the understanding of the functions of PDZ-domain-containing proteins in biomineralization and provide clues for determining the mechanisms of myostracum formation and muscle-shell attachment.
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Krishnamoorthy L, Cotruvo JA, Chan J, Kaluarachchi H, Muchenditsi A, Pendyala VS, Jia S, Aron AT, Ackerman CM, Vander Wal MN, Guan T, Smaga LP, Farhi SL, New EJ, Lutsenko S, Chang CJ. Copper regulates cyclic-AMP-dependent lipolysis. Nat Chem Biol 2016; 12:586-92. [PMID: 27272565 PMCID: PMC4955676 DOI: 10.1038/nchembio.2098] [Citation(s) in RCA: 134] [Impact Index Per Article: 16.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/09/2015] [Accepted: 03/25/2016] [Indexed: 01/03/2023]
Abstract
Cell signaling relies extensively on dynamic pools of redox-inactive metal ions such as sodium, potassium, calcium and zinc, but their redox-active transition metal counterparts such as copper and iron have been studied primarily as static enzyme cofactors. Here we report that copper is an endogenous regulator of lipolysis, the breakdown of fat, which is an essential process in maintaining body weight and energy stores. Using a mouse model of genetic copper misregulation, in combination with pharmacological alterations in copper status and imaging studies in a 3T3-L1 white adipocyte model, we found that copper regulates lipolysis at the level of the second messenger, cyclic AMP (cAMP), by altering the activity of the cAMP-degrading phosphodiesterase PDE3B. Biochemical studies of the copper-PDE3B interaction establish copper-dependent inhibition of enzyme activity and identify a key conserved cysteine residue in a PDE3-specific loop that is essential for the observed copper-dependent lipolytic phenotype.
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Affiliation(s)
- Lakshmi Krishnamoorthy
- Department of Chemistry, University of California, Berkeley, CA 94720, USA
- Howard Hughes Medical Institute, University of California, Berkeley, CA 94720, USA
| | - Joseph A. Cotruvo
- Department of Chemistry, University of California, Berkeley, CA 94720, USA
| | - Jefferson Chan
- Department of Chemistry, University of California, Berkeley, CA 94720, USA
| | | | - Abigael Muchenditsi
- Department of Physiology, Johns Hopkins University, School of Medicine, Baltimore, MD 21205, USA
| | | | - Shang Jia
- Department of Chemistry, University of California, Berkeley, CA 94720, USA
| | - Allegra T. Aron
- Department of Chemistry, University of California, Berkeley, CA 94720, USA
| | - Cheri M. Ackerman
- Department of Chemistry, University of California, Berkeley, CA 94720, USA
| | - Mark N. Vander Wal
- Department of Chemistry, University of California, Berkeley, CA 94720, USA
| | - Timothy Guan
- Department of Chemistry, University of California, Berkeley, CA 94720, USA
| | - Lukas P. Smaga
- Department of Chemistry, University of California, Berkeley, CA 94720, USA
| | - Samouil L. Farhi
- Department of Chemistry, University of California, Berkeley, CA 94720, USA
| | - Elizabeth J. New
- Department of Chemistry, University of California, Berkeley, CA 94720, USA
| | - Svetlana Lutsenko
- Department of Physiology, Johns Hopkins University, School of Medicine, Baltimore, MD 21205, USA
| | - Christopher J. Chang
- Department of Chemistry, University of California, Berkeley, CA 94720, USA
- Department of Molecular and Cell Biology, University of California, Berkeley, CA 94720, USA
- Howard Hughes Medical Institute, University of California, Berkeley, CA 94720, USA
- Helen Wills Neuroscience Institute, University of California, Berkeley, CA 94720, USA
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Hu E, Kunz RK, Rumfelt S, Andrews KL, Li C, Hitchcock SA, Lindstrom M, Treanor J. Use of structure based design to increase selectivity of pyridyl-cinnoline phosphodiesterase 10A (PDE10A) inhibitors against phosphodiesterase 3 (PDE3). Bioorg Med Chem Lett 2012; 22:6938-42. [DOI: 10.1016/j.bmcl.2012.09.010] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/24/2012] [Revised: 09/01/2012] [Accepted: 09/04/2012] [Indexed: 12/31/2022]
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Kerby MB, Lee J, Ziperstein J, Tripathi A. Kinetic measurements of protein conformation in a microchip. Biotechnol Prog 2007; 22:1416-25. [PMID: 17022682 DOI: 10.1021/bp060111n] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
This paper presents a microchip-based system for collecting kinetic time-based information on protein refolding and unfolding. Dynamic protein conformational change pathways were studied in microchannel flow using a microfluidic device. We present a protein-conserving approach for quantifying refolding by dynamically varying the concentration of the chemical denaturants, guanidine hydrochloride and urea. Short diffusion distances in the microchannel result in rapid equilibrium between protein and titrating solutions. Dilutions on the chip were tightly regulated using pressure controls rather than syringe-based flow, as verified with extensive on-chip tracer dye controls. To validate this protein assay method, folding transition experiments were performed using two well-characterized proteins, human serum albumin (HSA) and bovine carbonic anhydrase (BCA). Transition events were monitored through fluorescence intensity shifts of the protein dye 8-anilino-1-naphthalenesulfonic acid (ANS) during dilutions of protein from urea or guanidine hydrochloride solutions. The enzymatic activity of refolded BCA was measured by UV absorption through the conversion of p-nitrophenyl acetate (p-NPA). The microchip protein refolding transitions using ANS were well-correlated with conventional plate-based experiments. The microfluidic platform enables refolding studies to identify rapidly the optimal folding strategy for a protein using small quantities of material.
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Affiliation(s)
- Matthew B Kerby
- Biomedical Engineering and Chemical and Biochemical Engineering, Biochemical Engineering Laboratory, Division of Engineering, Brown University, Providence Rhode Island 02912, USA
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Vasta V, Shimizu-Albergine M, Beavo JA. Modulation of Leydig cell function by cyclic nucleotide phosphodiesterase 8A. Proc Natl Acad Sci U S A 2006; 103:19925-30. [PMID: 17172443 PMCID: PMC1750886 DOI: 10.1073/pnas.0609483103] [Citation(s) in RCA: 63] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/16/2006] [Indexed: 11/18/2022] Open
Abstract
Leydig cells produce testosterone in the testes under the pulsatile control of pituitary luteinizing hormone (LH). cAMP is the intracellular messenger for LH action on steroidogenesis, and pharmacological evidence indicates that the response to LH can be modulated by cyclic nucleotide phosphodiesterases (PDEs). However the types and roles of the PDEs present in Leydig cells have not been fully defined. We report here that PDE8A is expressed in Leydig cells, and using PDE8A knockout mice we provide evidence that PDE8A is a key regulator of LH signaling and steroidogenesis. A 4-fold increase in the sensitivity to LH for testosterone production was detected in Leydig cells isolated from PDE8A knockout mice. In Leydig cells from wild-type mice, 3-isobutyl-1-methylxanthine, a compound that inhibits all cAMP PDEs except PDE8A, elicited only a small increase in the sensitivity of testosterone production to LH. However, in the PDE8-null mice, the effect of this inhibitor is much more pronounced. These observations indicate that PDE8A and at least one other PDE control the same or a complementary pool of cAMP that mediates LH-regulated steroidogenesis. Overall, these results suggest that pharmacological manipulation of PDE8A, alone or in combination with other PDEs present in Leydig cells, may be exploited to modulate testosterone synthesis and possibly to treat various conditions where the local levels of this androgen need to be altered.
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Affiliation(s)
- Valeria Vasta
- Department of Pharmacology, University of Washington, 1959 NE Pacific Street, Seattle, WA 98195-7280
| | - Masami Shimizu-Albergine
- Department of Pharmacology, University of Washington, 1959 NE Pacific Street, Seattle, WA 98195-7280
| | - Joseph A. Beavo
- Department of Pharmacology, University of Washington, 1959 NE Pacific Street, Seattle, WA 98195-7280
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Hung SH, Zhang W, Pixley RA, Jameson BA, Huang YC, Colman RF, Colman RW. New Insights from the Structure-Function Analysis of the Catalytic Region of Human Platelet Phosphodiesterase 3A. J Biol Chem 2006; 281:29236-44. [PMID: 16873361 DOI: 10.1074/jbc.m606558200] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
Human phosphodiesterase 3A (PDE3A) degrades cAMP, the major inhibitor of platelet function, thus potentiating platelet function. Of the 11 human PDEs, only PDE3A and 3B have 44-amino acid inserts in the catalytic domain. Their function is not clear. Incubating Sp-adenosine-3',5'-cyclic-S-(4-bromo-2,3-di-oxobutyl) monophosphorothioate (Sp-cAMPS-BDB) with PDE3A irreversibly inactivates the enzyme. High pressure liquid chromatography (HPLC) analysis of a tryptic digest yielded an octapeptide within the insert of PDE3A ((K)T(806)YNVTDDK(813)), suggesting that a substrate-binding site exists within the insert. Because Sp-cAMPS-BDB reacts with nucleophilic residues, mutants Y807A, D811A, and D812A were produced. Sp-cAMPS-BDB inactivates D811A and D812A but not Y807A. A docking model showed that Tyr(807) is 3.3 angstroms from the reactive carbon, whereas Asp(811) and Asp(812) are >15 angstroms away from Sp-cAMPS-BDB. Y807A has an altered K(m) but no change in k(cat). Activity of wild type but not Y807A is inhibited by an anti-insert antibody. These data suggest that Tyr(807) is modified by Sp-cAMPS-BDB and involved in substrate binding. Because the homologous amino acid in PDE3B is Cys(792), we prepared the mutant Y807C and found that its K(m) and k(cat) were similar to the wild type. Moreover, Sp-cAMPS-BDB irreversibly inactivates Y807C with similar kinetics to wild type, suggesting that the tyrosine may, like the cysteine, serve as a H donor. Kinetic analyses of nine additional insert mutants reveal that H782A, T810A, Y814A, and C816S exhibit an altered k(cat) but not K(m), indicating that catalysis is modulated. We document a new functional role for the insert in which substrate binding may produce a conformational change. This change would allow the substrate to bind to Tyr(807) and other amino acids in the insert to interact with residues important for catalysis in the active site cleft.
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Affiliation(s)
- Su-Hwi Hung
- Sol Sherry Thrombosis Research Center, Temple University School of Medicine, Philadelphia, Pennsylvania 19140, USA
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