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Sanfilippo C, Castrogiovanni P, Imbesi R, Musumeci G, Vecchio M, Li Volti G, Tibullo D, Broggi G, Caltabiano R, Ulivieri M, Kazakova M, Parenti R, Vicario N, Fazio F, Di Rosa M. Sex-dependent neuro-deconvolution analysis of Alzheimer's disease brain transcriptomes according to CHI3L1 expression levels. J Neuroimmunol 2022; 373:577977. [PMID: 36228382 DOI: 10.1016/j.jneuroim.2022.577977] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2022] [Revised: 08/29/2022] [Accepted: 10/01/2022] [Indexed: 11/07/2022]
Abstract
Glial activation and related neuroinflammatory processes play a key role in the aging and progression of Alzheimer's disease (AD). CHI3L1/ YKL40 is a widely investigated chitinase in neurodegenerative diseases and recent studies have shown its involvement in aging and AD. Nevertheless, the biological function of CHI3L1 in AD is still unknown. Here, we collected microarray datasets from the National Center for Biotechnology Information (NCBI) brain samples of not demented healthy controls (NDHC) who died from causes not attributable to neurodegenerative disorders (n = 460), and of deceased patients suffering from Alzheimer's disease (AD) (n = 697). The NDHC and AD patients were stratified according to CHI3L1 expression levels as a cut-off. We identified two groups both males and females, subsequently used for our statistical comparisons: the high CHI3L1 expression group (HCEG) and the low CHI3L1 expression group (LCEG). Comparing HCEG to LCEG, we attained four signatures according to the sex of patients, in order to identify the healthy and AD brain cellular architecture, performing a genomic deconvolution analysis. We used neurological signatures (NS) belonging to six neurological cells populations and nine signatures that included the main physiological neurological processes. We discovered that, in the brains of NDHC the high expression levels of CHI3L1 were associated with astrocyte activation profile, while in AD males and females we showed an inflammatory profile microglia-mediated. The low CHI3L1 brain expression levels in NDHC and AD patients highlighted a neuronal activation profile. Furthermore, using drugs opposing CHI3L1 transcriptomic signatures, we found a specific drug profile for AD males and females characterized by high levels of CHI3L1 composed of fostamatinib, rucaparib, cephaeline, prednisolone, and dinoprostone. Brain levels of CHI3L1 in AD patients represent a biological signature that allows distinguishing between males and females and their likely cellular brain architecture.
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Affiliation(s)
- Cristina Sanfilippo
- Neurologic Unit, AOU "Policlinico-San Marco", Department of Medical, Surgical Sciences and Advanced Technologies, GF, Ingrassia, University of Catania, Via Santa Sofia n.78, 95100 Catania, Sicily, Italy
| | - Paola Castrogiovanni
- Department of Biomedical and Biotechnological Sciences, Anatomy, Histology and Movement Sciences Section, School of Medicine, University of Catania, 95125 Catania, Italy
| | - Rosa Imbesi
- Department of Biomedical and Biotechnological Sciences, Anatomy, Histology and Movement Sciences Section, School of Medicine, University of Catania, 95125 Catania, Italy
| | - Giuseppe Musumeci
- Department of Biomedical and Biotechnological Sciences, Anatomy, Histology and Movement Sciences Section, School of Medicine, University of Catania, 95125 Catania, Italy
| | - Michele Vecchio
- Rehabilitation Unit, "AOU Policlinico Vittorio Emanuele", Department of Biomedical and Biotechnological Sciences, Section of Pharmacology, University of Catania, Catania 95123, Italy
| | - Giovanni Li Volti
- Department of Biomedical and Biotechnological Sciences, Section of Biochemistry, University of Catania, 95123, Catania, Italy
| | - Daniele Tibullo
- Department of Biomedical and Biotechnological Sciences, Section of Biochemistry, University of Catania, 95123, Catania, Italy
| | - Giuseppe Broggi
- Department of Medical and Surgical Sciences and Advanced Technologies "G. F. Ingrassia", Anatomic Pathology, University of Catania, 95123, Catania, Italy
| | - Rosario Caltabiano
- Department of Medical and Surgical Sciences and Advanced Technologies "G. F. Ingrassia", Anatomic Pathology, University of Catania, 95123, Catania, Italy
| | - Martina Ulivieri
- University of California San Diego, Department of Psychiatry, Health Science, San Diego, La Jolla, CA, USA
| | - Maria Kazakova
- Department of Medical Biology, Medical University, Plovdiv, 4002 Plovdiv, Bulgaria; Research Institute, Medical University-, Plovdiv, 4002 Plovdiv, Bulgaria
| | - Rosalba Parenti
- Department of Biomedical and Biotechnological Sciences, University of Catania, 95123 Catania, Italy
| | - Nunzio Vicario
- Department of Biomedical and Biotechnological Sciences, University of Catania, 95123 Catania, Italy
| | - Francesco Fazio
- University of California San Diego, Department of Psychiatry, Health Science, San Diego, La Jolla, CA, USA
| | - Michelino Di Rosa
- Department of Biomedical and Biotechnological Sciences, Anatomy, Histology and Movement Sciences Section, School of Medicine, University of Catania, 95125 Catania, Italy.
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Sanfilippo C, Castrogiovanni P, Vinciguerra M, Imbesi R, Ulivieri M, Fazio F, Blennow K, Zetterberg H, Di Rosa M. A sex-stratified analysis of neuroimmune gene expression signatures in Alzheimer's disease brains. GeroScience 2022; 45:523-541. [PMID: 36136224 PMCID: PMC9886773 DOI: 10.1007/s11357-022-00664-7] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/26/2022] [Accepted: 09/14/2022] [Indexed: 02/03/2023] Open
Abstract
Alzheimer's disease (AD) is the most common form of progressively disabling dementia. The chitinases CHI3L1 and CHI3L2 have long been known as biomarkers for microglial and astrocytic activation in neurodegeneration. Here, we collected microarray datasets from the National Center for Biotechnology Information (NCBI) brain samples of non-demented controls (NDC) (n = 460), and of deceased patients with AD (n = 697). The AD patients were stratified according to sex. Comparing the high CHI3L1 and CHI3L2 expression group (75th percentile), and low CHI3L1 and CHI3L2 expression group (25th percentile), we obtained eight signatures according to the sex of patients and performed a genomic deconvolution analysis using neuroimmune signatures (NIS) belonging to twelve cell populations. Expression analysis revealed significantly higher CHI3L1 and CHI3L2 expression in AD compared with NDC, and positive correlations of these genes with GFAP and TMEM119. Furthermore, deconvolution analysis revealed that CHI3L1 and CHI3L2 high expression was associated with inflammatory signatures in both sexes. Neuronal activation profiles were significantly activated in AD patients with low CHI3L1 and CHI3L2 expression levels. Furthermore, gene ontology analysis of common genes regulated by the two chitinases unveiled immune response as a main biological process. Finally, microglia NIS significantly correlated with CHI3L2 expression levels and were more than 98% similar to microglia NIS determined by CHI3L1. According to our results, high levels of CHI3L1 and CHI3L2 in the brains of AD patients are associated with inflammatory transcriptomic signatures. The high correlation between CHI3L1 and CHI3L2 suggests strong co-regulation.
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Affiliation(s)
- Cristina Sanfilippo
- Neurologic Unit, AOU “Policlinico-San Marco”, Department of Medical, Surgical Sciences and Advanced Technologies, GF, Ingrassia, University of Catania, Catania, Sicily Italy
| | - Paola Castrogiovanni
- Department of Biomedical and Biotechnological Sciences, Anatomy, Histology and Movement Sciences Section, School of Medicine, University of Catania, Catania, Italy
| | - Manlio Vinciguerra
- International Clinical Research Center, St. Anne’s University Hospital, Brno, Czech Republic ,Department of Translational Stem Cell Biology, Research Institute of the Medical University of Varna, Varna, Bulgaria
| | - Rosa Imbesi
- Department of Biomedical and Biotechnological Sciences, Anatomy, Histology and Movement Sciences Section, School of Medicine, University of Catania, Catania, Italy
| | - Martina Ulivieri
- Department of Psychiatry, University of California San Diego, La Jolla, CA USA
| | - Francesco Fazio
- Department of Psychiatry, University of California San Diego, La Jolla, CA USA
| | - Kaj Blennow
- Department of Psychiatry and Neurochemistry, Institute of Neuroscience and Physiology, Sahlgrenska Academy at the University of Gothenburg, Mölndal, Sweden
| | - Henrik Zetterberg
- Department of Psychiatry and Neurochemistry, Institute of Neuroscience and Physiology, Sahlgrenska Academy at the University of Gothenburg, Mölndal, Sweden ,Clinical Neurochemistry Laboratory, Sahlgrenska University Hospital, Mölndal, Sweden ,UK Dementia Research Institute at UCL, London, UK ,Department of Neurodegenerative Disease, UCL Institute of Neurology, London, UK
| | - Michelino Di Rosa
- Department of Biomedical and Biotechnological Sciences, Anatomy, Histology and Movement Sciences Section, School of Medicine, University of Catania, Catania, Italy.
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Zeng B, Zhao S, Zhou R, Zhou Y, Jin W, Yi Z, Zhang G. Engineering and screening of novel β-1,3-xylanases with desired hydrolysate type by optimized ancestor sequence reconstruction and data mining. Comput Struct Biotechnol J 2022; 20:3313-3321. [PMID: 35832630 PMCID: PMC9251504 DOI: 10.1016/j.csbj.2022.06.050] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/21/2022] [Revised: 06/22/2022] [Accepted: 06/22/2022] [Indexed: 11/03/2022] Open
Abstract
A novel integrative strategy for engineering β-1,3-xylanases with desired products. AncXyl10 is the first successful example of ASR to shift the hydrolysate types. The hydrolysates of AncXyl10 was only β-1,3-xylobiose and β-1,3-xylotriose. The underlying mechanism laid a new groundwork towards hydrolase engineering.
Engineering of hydrolases to shift their hydrolysate types has not been attempted so far, though computer-assisted enzyme design has been successful. A novel integrative strategy for engineering and screening the β-1,3-xylanase with desired hydrolysate types was proposed, with the purpose to solve problems that the separation and preparation of β-1,3-xylo-oligosaccharides was in high cost yet in low yield as monosaccharides existed in the hydrolysates. By classifying the hydrolysate types and coding them into numerical values, two robust mathematical models with five selected attributes from molecular docking were established based on LogitBoost and partial least squares regression with overall accuracy of 83.3% and 100%, respectively. Then, they were adopted for efficient screening the potential mutagenesis library of β-1,3-xylanases that only product oligosaccharides. The virtually designed AncXyl10 was selected and experimentally verified to produce only β-1,3-xylobiose (60.38%) and β-1,3-xylotriose (39.62%), which facilitated the preparation of oligosaccharides with high purity. The underlying mechanism of AncXyl10 may associated with the gap processing and ancestral amino acid substitution in the process of ancestral sequence reconstruction. Since many carbohydrate-active enzymes have highly conserved active sites, the strategy and their biomolecular basis will shield a new light for engineering carbohydrates hydrolase to produce specific oligosaccharides.
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Multi-functionality of a tryptophan residue conserved in substrate-binding groove of GH19 chitinases. Sci Rep 2021; 11:2494. [PMID: 33510258 PMCID: PMC7844276 DOI: 10.1038/s41598-021-81903-3] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/01/2020] [Accepted: 12/30/2020] [Indexed: 11/08/2022] Open
Abstract
GH19 and GH22 glycoside hydrolases belonging to the lysozyme superfamily have a related structure/function. A highly conserved tryptophan residue, Trp103, located in the binding groove of a GH19 chitinase from moss Bryum coronatum (BcChi-A) appears to have a function similar to that of well-known Trp62 in GH22 lysozymes. Here, we found that mutation of Trp103 to phenylalanine (W103F) or alanine (W103A) strongly reduced the enzymatic activity of BcChi-A. NMR experiments and the X-ray crystal structure suggested a hydrogen bond between the Trp103 side chain and the -2 sugar. Chitooligosaccharide binding experiments using NMR indicated that the W103F mutation reduced the sugar-binding abilities of nearby amino acid residues (Tyr105/Asn106) in addition to Trp103. This appeared to be derived from enhanced aromatic stacking of Phe103 with Tyr105 induced by disruption of the Trp103 hydrogen bond with the -2 sugar. Since the stacking with Tyr105 was unlikely in W103A, Tyr105/Asn106 of W103A was not so affected as in W103F. However, the W103A mutation appeared to reduce the catalytic potency, resulting in the lowest enzymatic activity in W103A. We concluded that Trp103 does not only interact with the sugar, but also controls other amino acids responsible for substrate binding and catalysis. Trp103 (GH19) and Trp62 (GH22) with such a multi-functionality may be advantageous for enzyme action and conserved in the divergent evolution in the lysozyme superfamily.
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Sørlie M, Horn SJ, Vaaje-Kolstad G, Eijsink VG. Using chitosan to understand chitinases and the role of processivity in the degradation of recalcitrant polysaccharides. REACT FUNCT POLYM 2020. [DOI: 10.1016/j.reactfunctpolym.2020.104488] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
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Effects of mutations of non-catalytic aromatic residues on substrate specificity of Bacillus licheniformis endocellulase cel12A. Process Biochem 2018. [DOI: 10.1016/j.procbio.2018.01.019] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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Prajapati AS, Pawar VA, Panchal KJ, Sudhir AP, Dave BR, Patel DH, Subramanian RB. Effects of substrate binding site residue substitutions of xynA from Bacillus amyloliquefaciens on substrate specificity. BMC Biotechnol 2018; 18:9. [PMID: 29439688 PMCID: PMC5812043 DOI: 10.1186/s12896-018-0420-7] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/15/2017] [Accepted: 01/30/2018] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND The aromatic residues of xylanase enzyme, W187, Y124, W144, Y128 and W63 of substrate binding pocket from Bacillus amyloliquefaciens were investigated for their role in substrate binding by homology modelling and sequence analysis. These residues are highly conserved and play an important role in substrate binding through steric hindrance. The substitution of these residues with alanine allows the enzyme to accommodate nonspecific substrates. RESULTS Wild type and mutated genes were cloned and overexpressed in BL21. Optimum pH and temperature of rBAxn exhibited pH 9.0 and 50 °C respectively and it was stable up to 215 h. Along with the physical properties of rBAxn, kinetic parameters (Km 19.34 ± 0.72 mg/ml; kcat 6449.12 ± 155.37 min- 1 and kcat/Km 333.83 ± 6.78 ml min- 1 mg- 1) were also compared with engineered enzymes. Out of five mutations, W63A, Y128A and W144A lost almost 90% activity and Y124A and W187A retained almost 40-45% xylanase activity. CONCLUSIONS The site-specific single mutation, led to alteration in substrate specificity from xylan to CMC while in case of double mutant the substrate specificity was altered from xylan to CMC, FP and avicel, indicating the role of aromatic residues on substrate binding, catalytic process and overall catalytic efficiency.
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Affiliation(s)
- Anil S. Prajapati
- P. G. Department of Biosciences, UGC-Centre of advanced studies, Satellite campus, Sardar Patel University, Sardar Patel Maidan, Bakrol-Vadtal Road, PO Box 39, Vallabh Vidyanagar, Gujarat 388 120 India
| | - Vishakha A. Pawar
- P. G. Department of Biosciences, UGC-Centre of advanced studies, Satellite campus, Sardar Patel University, Sardar Patel Maidan, Bakrol-Vadtal Road, PO Box 39, Vallabh Vidyanagar, Gujarat 388 120 India
| | - Ketankumar J. Panchal
- P. G. Department of Biosciences, UGC-Centre of advanced studies, Satellite campus, Sardar Patel University, Sardar Patel Maidan, Bakrol-Vadtal Road, PO Box 39, Vallabh Vidyanagar, Gujarat 388 120 India
| | - Ankit P. Sudhir
- P. G. Department of Biosciences, UGC-Centre of advanced studies, Satellite campus, Sardar Patel University, Sardar Patel Maidan, Bakrol-Vadtal Road, PO Box 39, Vallabh Vidyanagar, Gujarat 388 120 India
| | - Bhaumik R. Dave
- P. G. Department of Biosciences, UGC-Centre of advanced studies, Satellite campus, Sardar Patel University, Sardar Patel Maidan, Bakrol-Vadtal Road, PO Box 39, Vallabh Vidyanagar, Gujarat 388 120 India
| | - Darshan H. Patel
- P. D. Patel Institute of Applied Sciences, Charotar University of Science and Technology (CHARUSAT), Changa, Anand, Gujarat India
| | - R. B. Subramanian
- P. G. Department of Biosciences, UGC-Centre of advanced studies, Satellite campus, Sardar Patel University, Sardar Patel Maidan, Bakrol-Vadtal Road, PO Box 39, Vallabh Vidyanagar, Gujarat 388 120 India
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Wakita S, Kobayashi S, Kimura M, Kashimura A, Honda S, Sakaguchi M, Sugahara Y, Kamaya M, Matoska V, Bauer PO, Oyama F. Mouse acidic mammalian chitinase exhibits transglycosylation activity at somatic tissue pH. FEBS Lett 2017; 591:3310-3318. [DOI: 10.1002/1873-3468.12798] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/07/2017] [Revised: 08/11/2017] [Accepted: 08/11/2017] [Indexed: 12/21/2022]
Affiliation(s)
- Satoshi Wakita
- Department of Chemistry and Life Science; Kogakuin University; Hachioji Tokyo Japan
| | - Shunsuke Kobayashi
- Department of Chemistry and Life Science; Kogakuin University; Hachioji Tokyo Japan
| | - Masahiro Kimura
- Department of Chemistry and Life Science; Kogakuin University; Hachioji Tokyo Japan
| | - Akinori Kashimura
- Department of Chemistry and Life Science; Kogakuin University; Hachioji Tokyo Japan
| | - Shotaro Honda
- Department of Chemistry and Life Science; Kogakuin University; Hachioji Tokyo Japan
| | - Masayoshi Sakaguchi
- Department of Chemistry and Life Science; Kogakuin University; Hachioji Tokyo Japan
| | - Yasusato Sugahara
- Department of Chemistry and Life Science; Kogakuin University; Hachioji Tokyo Japan
| | - Minori Kamaya
- Department of Applied Chemistry; Kogakuin University; Hachioji Tokyo Japan
| | - Vaclav Matoska
- Laboratory of Molecular Diagnostics; Department of Clinical Biochemistry, Hematology and Immunology; Homolka Hospital; Prague Czech Republic
| | - Peter O. Bauer
- Laboratory of Molecular Diagnostics; Department of Clinical Biochemistry, Hematology and Immunology; Homolka Hospital; Prague Czech Republic
- Bioinova Ltd.; Prague Czech Republic
| | - Fumitaka Oyama
- Department of Chemistry and Life Science; Kogakuin University; Hachioji Tokyo Japan
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Abdul Manas NH, Md Illias R, Mahadi NM. Strategy in manipulating transglycosylation activity of glycosyl hydrolase for oligosaccharide production. Crit Rev Biotechnol 2017; 38:272-293. [PMID: 28683572 DOI: 10.1080/07388551.2017.1339664] [Citation(s) in RCA: 43] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
BACKGROUND The increasing market demand for oligosaccharides has intensified the need for efficient biocatalysts. Glycosyl hydrolases (GHs) are still gaining popularity as biocatalyst for oligosaccharides synthesis owing to its simple reaction and high selectivity. PURPOSE Over the years, research has advanced mainly directing to one goal; to reduce hydrolysis activity of GHs for increased transglycosylation activity in achieving high production of oligosaccharides. DESIGN AND METHODS This review concisely presents the strategies to increase transglycosylation activity of GHs for oligosaccharides synthesis, focusing on controlling the reaction equilibrium, and protein engineering. Various modifications of the subsites of GHs have been demonstrated to significantly modulate the hydrolysis and transglycosylation activity of the enzymes. The clear insight of the roles of each amino acid in these sites provides a platform for designing an enzyme that could synthesize a specific oligosaccharide product. CONCLUSIONS The key strategies presented here are important for future improvement of GHs as a biocatalyst for oligosaccharide synthesis.
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Affiliation(s)
- Nor Hasmaliana Abdul Manas
- a Department of Chemical Engineering and Energy Sustainability, Faculty of Engineering , Universiti Malaysia Sarawak , Kota Samarahan , Malaysia.,b BioMolecular and Microbial Process Research Group , Health and Wellness Research Alliance, Universiti Teknologi Malaysia , Johor , Malaysia
| | - Rosli Md Illias
- b BioMolecular and Microbial Process Research Group , Health and Wellness Research Alliance, Universiti Teknologi Malaysia , Johor , Malaysia.,c Department of Bioprocess Engineering, Faculty of Chemical and Energy Engineering , Universiti Teknologi Malaysia , Skudai , Malaysia
| | - Nor Muhammad Mahadi
- d Comparative Genomics and Genetics Research Centre , Malaysia Genome Institute , Kajang , Malaysia
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Kuusk S, Sørlie M, Väljamäe P. Human Chitotriosidase Is an Endo-Processive Enzyme. PLoS One 2017; 12:e0171042. [PMID: 28129403 PMCID: PMC5271402 DOI: 10.1371/journal.pone.0171042] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/04/2016] [Accepted: 01/13/2017] [Indexed: 01/17/2023] Open
Abstract
Human chitotriosidase (HCHT) is involved in immune response to chitin-containing pathogens in humans. The enzyme is able to degrade chitooligosaccharides as well as crystalline chitin. The catalytic domain of HCHT is connected to the carbohydrate binding module (CBM) through a flexible hinge region. In humans, two active isoforms of HCHT are found-the full length enzyme and its truncated version lacking CBM and the hinge region. The active site architecture of HCHT is reminiscent to that of the reducing-end exo-acting processive chitinase ChiA from bacterium Serratia marcescens (SmChiA). However, the presence of flexible hinge region and occurrence of two active isoforms are reminiscent to that of non-processive endo-chitinase from S. marcescens, SmChiC. Although the studies on soluble chitin derivatives suggest the endo-character of HCHT, the mode of action of the enzyme on crystalline chitin is not known. Here, we made a thorough characterization of HCHT in terms of the mode of action, processivity, binding, and rate constants for the catalysis and dissociation using α-chitin as substrate. HCHT efficiently released the end-label from reducing-end labelled chitin and had also high probability (95%) of endo-mode initiation of processive run. These results qualify HCHT as an endo-processive enzyme. Processivity and the rate constant of dissociation of HCHT were found to be in-between those, characteristic to processive exo-enzymes, like SmChiA and randomly acting non-processive endo-enzymes, like SmChiC. Apart from increasing the affinity for chitin, CBM had no major effect on kinetic properties of HCHT.
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Affiliation(s)
- Silja Kuusk
- Institute of Molecular and Cell Biology, University of Tartu, Tartu, Estonia
- * E-mail:
| | - Morten Sørlie
- Department of Chemistry, Biotechnology and Food Science, Norwegian University of Life Sciences, Ås, Norway
| | - Priit Väljamäe
- Institute of Molecular and Cell Biology, University of Tartu, Tartu, Estonia
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Sanfilippo C, Nunnari G, Calcagno A, Malaguarnera L, Blennow K, Zetterberg H, Di Rosa M. The chitinases expression is related to Simian Immunodeficiency Virus Encephalitis (SIVE) and in HIV encephalitis (HIVE). Virus Res 2017; 227:220-230. [DOI: 10.1016/j.virusres.2016.10.012] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/13/2016] [Revised: 09/14/2016] [Accepted: 10/21/2016] [Indexed: 01/15/2023]
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