Comprehensive mapping of the bull sperm surface proteome

While the mechanisms that underpin maturation, capacitation, and sperm–egg interactions remain elusive it is known that these essential fertilisation events are driven by the protein complement of the sperm surface. Understanding these processes is critical to the regulation of animal reproduction,...

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Published in:Proteomics (Weinheim) Vol. 12; no. 23-24; pp. 3559 - 3579
Main Authors: Byrne, Keren, Leahy, Tamara, McCulloch, Russell, Colgrave, Michelle L., Holland, Michael K.
Format: Journal Article
Language:English
Published: Germany Blackwell Publishing Ltd 01.12.2012
Wiley Subscription Services, Inc
Subjects:
Animal proteomics
Animals
Bovine
Cattle
Fertility
Fractionation
Male
Mammals
Membrane proteins
Membrane Proteins - analysis
Membrane Proteins - metabolism
Plasma membrane
Protein Interaction Mapping
Protein Interaction Maps
Proteins
Proteome - analysis
Proteome - metabolism
Proteomics
Spectrometry, Mass, Matrix-Assisted Laser Desorption-Ionization
Sperm
Sperm-Ovum Interactions
Spermatozoa
Spermatozoa - cytology
Spermatozoa - metabolism
ISSN:1615-9853, 1615-9861, 1615-9861
Online Access:Get full text
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Summary:While the mechanisms that underpin maturation, capacitation, and sperm–egg interactions remain elusive it is known that these essential fertilisation events are driven by the protein complement of the sperm surface. Understanding these processes is critical to the regulation of animal reproduction, but few studies have attempted to define the full repertoire of sperm surface proteins in animals of agricultural importance. Recent developments in proteomics technologies, subcellular fractionation, and optimised solubilisation strategies have enhanced the potential for the comprehensive characterisation of the sperm surface proteome. Here we report the identification of 419 proteins from a mature bull sperm plasma membrane fraction. Protein domain enrichment analyses indicate that 67% of all the proteins identified may be membrane associated. A large number of the proteins identified are conserved between mammalian species and are reported to play key roles in sperm–egg communication, capacitation and fertility. The major functional pathways identified were related to protein catabolism (26S proteasome complex), chaperonin‐containing TCP‐1 (CCT) complex and fundamental metabolic processes such as glycolysis and energy production. We have also identified 118 predicted transmembrane proteins, some of which are implicated in cell adhesion, acrosomal exocytosis, vesicle transport and immunity and fertilisation events, while others have not been reported in mammalian LC‐MS‐derived sperm proteomes to date. Comparative proteomics and functional network analyses of these proteins expand our system's level of understanding of the bull sperm proteome and provide important clues toward finding the essential conserved function of these proteins.
Bibliography:ark:/67375/WNG-92917T3V-N
istex:73BFD0EECCA861FEF7968DF0AADD592D68EE59BE
ArticleID:PMIC7264
Dairy Futures CRC and Genetics Australia
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ISSN:1615-9853
1615-9861
1615-9861
DOI:10.1002/pmic.201200133