Structural analysis of the Ss sialoglycoprotein specific for Henshaw blood group from human erythrocyte membranes.
Eur J Biochem
; 141(1): 51-5, 1984 May 15.
Article
en En
| MEDLINE
| ID: mdl-6723663
ABSTRACT
The N-terminal structures of the MN and Ss erythrocyte membrane sialoglycoproteins (glycophorins A, B) from two Henshaw (He) blood-group heterozygotes were determined by manual sequencing of tryptic glycopeptides and various secondary fragments. No structural alteration of the MN glycoprotein could be detected. The He-specific portion of the Ss glycoprotein was found to exhibit the N-terminal sequence Trp-Ser+-Thr+-Ser+-Gly-(+ = glycosylation). Thus it differs at three positions from its normal counterpart which possesses 'N' activity and exhibits the N-terminal structure Leu-Ser+-Thr+-Thr+-Glu-. Analysis of the Ss glycoprotein from 15 He-negative erythrocyte samples did not reveal any of the three He-specific structural alterations. The presence of a glycine residue at the fifth position of the blood-group-M-active MN glycoprotein as well as in the He-specific Ss glycoprotein provides an explanation for the occurrence of antisera (anti-Me) reacting with the M and He antigens.
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Banco de datos:
MEDLINE
Asunto principal:
Sialoglicoproteínas
/
Glicoforinas
/
Membrana Eritrocítica
/
Sistema del Grupo Sanguíneo MNSs
Límite:
Humans
Idioma:
En
Año:
1984
Tipo del documento:
Article