Reactome | ABO-B:Mn2+ transfers Gal to H antigen-RBC to form B antigen-RBC

ABO-B:Mn2+ transfers Gal to H antigen-RBC to form B antigen-RBC

Stable Identifier

R-HSA-9033961

Type

Reaction [transition]

Species

Homo sapiens

Compartment

cytosol, Golgi membrane

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ABO-B:Mn2+ transfers Gal to H antigen-RBC to form B antigen-RBC

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The histo-blood group ABO system transferase (ABO) is the basis of the ABO blood group system. A, B and AB individuals express glycosyltransferase activity that converts the H antigen to the A antigen (by addition of GalNAc), to the B antigen (by addition of Gal) or to the AB antigen (by the addition of both GalNAc and Gal). O group individuals lack such activity. Differences in four critical amino acids (176, 235, 266 and 268) alter the specificity from an A to a B glycosyltransferase (Yamamoto et al. 1990, Yamamoto & McNeill 1996, Seto et al. 1999, Alfaro et al. 2008). The histo-blood group B transferase (ABO-B) utilises UDP-Gal to transfer galactose (Gal) to the H antigen formed via Type 2 chains to form the B antigen (Patenaude et al. 2002, Persson et al. 2007).

Literature References

PubMed ID	Title	Journal	Year
18192272	ABO(H) blood group A and B glycosyltransferases recognize substrate via specific conformational changes Alfaro, JA, Zheng, RB, Persson, M, Letts, JA, Polakowski, R, Bai, Y, Borisova, SN, Seto, NO, Lowary, TL, Palcic, MM, Evans, SV	J. Biol. Chem.	2008
2333095	Molecular genetic basis of the histo-blood group ABO system Yamamoto, F, Clausen, H, White, T, Marken, J, Hakomori, S	Nature	1990
12198488	The structural basis for specificity in human ABO(H) blood group biosynthesis Patenaude, SI, Seto, NO, Borisova, SN, Szpacenko, A, Marcus, SL, Palcic, MM, Evans, SV	Nat. Struct. Biol.	2002
8631849	Amino acid residue at codon 268 determines both activity and nucleotide-sugar donor substrate specificity of human histo-blood group A and B transferases. In vitro mutagenesis study Yamamoto, F, McNeill, PD	J. Biol. Chem.	1996
10092863	Donor substrate specificity of recombinant human blood group A, B and hybrid A/B glycosyltransferases expressed in Escherichia coli Seto, NO, Compston, CA, Evans, SV, Bundle, DR, Narang, SA, Palcic, MM	Eur. J. Biochem.	1999
17259183	Structural effects of naturally occurring human blood group B galactosyltransferase mutations adjacent to the DXD motif Persson, M, Letts, JA, Hosseini-Maaf, B, Borisova, SN, Palcic, MM, Evans, SV, Olsson, ML	J. Biol. Chem.	2007