Determination of the complete covalent structure of the major glycoform of DQH sperm surface protein, a novel trypsin-resistant boar seminal plasma O-glycoprotein related to pB1 protein
Jazyk angličtina Země Spojené státy americké Médium print
Typ dokumentu časopisecké články, práce podpořená grantem
PubMed
10422846
PubMed Central
PMC2144377
DOI
10.1110/ps.8.7.1551
Knihovny.cz E-zdroje
- MeSH
- glykoproteiny chemie MeSH
- glykosylace MeSH
- konformace proteinů MeSH
- membránové glykoproteiny chemie MeSH
- molekulární sekvence - údaje MeSH
- molekulová hmotnost MeSH
- prasata MeSH
- sekvence aminokyselin MeSH
- spektrometrie hmotnostní - ionizace laserem za účasti matrice MeSH
- transportní proteiny chemie MeSH
- zvířata MeSH
- Check Tag
- mužské pohlaví MeSH
- zvířata MeSH
- Publikační typ
- časopisecké články MeSH
- práce podpořená grantem MeSH
- Názvy látek
- DQH sperm surface protein, Sus scrofa MeSH Prohlížeč
- glykoproteiny MeSH
- membránové glykoproteiny MeSH
- pAIF-1 protein, Sus scrofa MeSH Prohlížeč
- transportní proteiny MeSH
The complete covalent structure of a novel boar DQH sperm surface protein resistant to many classical procedures of enzymatic fragmentation was determined. The relative molecular mass of the major form of this protein determined by ESI-MS and MALDI-MS was 13,065.2+/-1.0 and 13,065.1, respectively. However, additional peaks differing by 162 Da (i.e., minus hexose), 365 Da (i.e., minus hexose and N-acetylhexosamine), 146 Da (i.e., plus deoxyhexose), and 291 Da (i.e., plus sialic acid) indicated the heterogeneity due to differences in glycosylation. The complete covalent structure of the protein was determined using automated Edman degradation, MALDI-MS, and post-source decay (PSD) MALDI-MS, and shown to consist of N-terminal O-glycosylated peptide followed by two fibronectin type II repeats. The carbohydrates are O-glycosidically linked to threonine 10, as confirmed by PSD MALDI-MS of the isolated N-terminal glycopeptide. Eight cysteine residues of the protein form four disulfide bridges, the positions of which were assigned from MALDI-MS and Edman degradation data. We conclude that mass spectral techniques provide an indispensable tool for the detailed analysis of the covalent structure of proteins, especially those that are refractory to standard approaches of protein chemistry.
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Ligands and Receptors Involved in the Sperm-Zona Pellucida Interactions in Mammals
Compounds isolated at the Institute of Microbiology in 1989-2001 and future trends
PIR
A58837
