GT-CORE (public beta v1)

Glycosyltransferase Curated Online Resource for Enzymology

Family-organised sequence, structure, mechanism and substrate-specificity records for the CAZy glycosyltransferases

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PIGB

Homo sapiens · GPI alpha-1,2-mannosyltransferase 3 (EC 2.4.1.-)

GT22Model organism · annotation ≥ 4Fold GT-CInverting

External resources

UniProt Q92521AlphaFold modelInterPro domainsNCBI Gene 9488CAZy GT22

Identification and annotation

CAZy familyGT22 · CAZy entry
Gene symbolPIGB
Synonyms / alternate names
  • GPI mannosyltransferase III
  • Phosphatidylinositol-glycan biosynthesis class B protein
UniProt accessionQ92521
NCBI Gene ID9488
Source speciesHomo sapiens
Taxonomic domainEukaryota
UniProt annotation level5

Function and localisation

Enzyme functionGPI alpha-1,2-mannosyltransferase 3 (EC 2.4.1.-)
Subcellular locationEndoplasmic reticulum membrane

Structure and mechanism

Fold typeGT-C
Catalytic mechanismInverting
Cation dependenceNo
Oligomeric statenot curated
PDB structuresnot curated

Donor and acceptor specificity

Sugar nucleotide donornot curated
Donor CCD code(s)not curated
Acceptor substrate(s)
  • a 2-acyl-6-[alpha-D-mannosyl-(1->6)-2-phosphoethanolamine-alpha-D-mannosyl-(1->4)-alpha-D-glucosaminyl]-1-(1-radyl,2-acyl-sn-glycero-3-phospho)-1D-myo-inositol
  • a di-trans,poly-cis-dolichyl beta-D-mannosyl phosphate
  • a 2-acyl-6-[alpha-D-mannosyl-(1->6)-alpha-D-mannosyl-(1->4)-alpha-D-glucosaminyl]-1-(1-radyl,2-acyl-sn-glycero-3-phospho)-1D-myo-inositol
Acceptor CCD / GlycoCTnot curated

Protein sequences

Full protein sequence

554 aa 
MRRPLSKCGMEPGGGDASLTLHGLQNRSHGKIKLRKRKSTLYFNTQEKSARRRGDLLGENIYLLLFTIALRILNCFLVQTSFVPDEYWQSLEVSHHMVFNYGYLTWEWTERLRSYTYPLIFASIYKILHLLGKDSVQLLIWIPRLAQALLSAVADVRLYSLMKQLENQEVARWVFFCQLCSWFTWYCCTRTLTNTMETVLTIIALFYYPLEGSKSMNSVKYSSLVALAFIIRPTAVILWTPLLFRHFCQEPRKLDLILHHFLPVGFVTLSLSLMIDRIFFGQWTLVQFNFLKFNVLQNWGTFYGSHPWHWYFSQGFPVILGTHLPFFIHGCYLAPKRYRILLVTVLWTLLVYSMLSHKEFRFIYPVLPFCMVFCGYSLTHLKTWKKPALSFLFLSNLFLALYTGLVHQRGTLDVMSHIQKVCYNNPNKSSASIFIMMPCHSTPYYSHVHCPLPMRFLQCPPDLTGKSHYLDEADVFYLNPLNWLHREFHDDASLPTHLITFSILEEEISAFLISSNYKRTAVFFHTHLPEGRIGSHIYVYERKLKGKFNMKMKF

Catalytic domain sequence

387 aa 
LLLFTIALRILNCFLVQTSFVPDEYWQSLEVSHHMVFNYGYLTWEWTERLRSYTYPLIFASIYKILHLLGKDSVQLLIWIPRLAQALLSAVADVRLYSLMKQLENQEVARWVFFCQLCSWFTWYCCTRTLTNTMETVLTIIALFYYPLEGSKSMNSVKYSSLVALAFIIRPTAVILWTPLLFRHFCQEPRKLDLILHHFLPVGFVTLSLSLMIDRIFFGQWTLVQFNFLKFNVLQNWGTFYGSHPWHWYFSQGFPVILGTHLPFFIHGCYLAPKRYRILLVTVLWTLLVYSMLSHKEFRFIYPVLPFCMVFCGYSLTHLKTWKKPALSFLFLSNLFLALYTGLVHQRGTLDVMSHIQKVCYNNPNKSSASIFIMMPCHSTPYYSHVH
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