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4XIL

Crystal structure of the NanB sialidase from streptococcus pneumoniae in complex with Optactin at pH 7.4 in PBS with MPD as the cryoprotectant

Functional Information from GO Data
ChainGOidnamespacecontents
A0004308molecular_functionexo-alpha-sialidase activity
A0005737cellular_componentcytoplasm
A0005975biological_processcarbohydrate metabolic process
A0006689biological_processganglioside catabolic process
A0009313biological_processoligosaccharide catabolic process
A0016020cellular_componentmembrane
A0016787molecular_functionhydrolase activity
A0016798molecular_functionhydrolase activity, acting on glycosyl bonds
Functional Information from PDB Data
site_idAC1
Number of Residues13
Detailsbinding site for residue OPX A 701
ChainResidue
ATYR250
AHOH991
AHOH943
AHOH835
AHOH985
ATHR251
AGLN494
ALYS499
AILE596
ATHR657
AGLU658
ALEU659
AHOH1175

Functional Information from SwissProt/UniProt
site_idSWS_FT_FI1
Number of Residues1
DetailsACT_SITE: Proton acceptor => ECO:0000250
ChainResidueDetails
AASP270

site_idSWS_FT_FI2
Number of Residues1
DetailsACT_SITE: ACT_SITE => ECO:0000255
ChainResidueDetails
AGLU541

site_idSWS_FT_FI3
Number of Residues1
DetailsACT_SITE: Nucleophile => ECO:0000250
ChainResidueDetails
ATYR653

site_idSWS_FT_FI4
Number of Residues3
DetailsBINDING: BINDING => ECO:0000250
ChainResidueDetails
AARG245
AARG557
AARG619

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PDB entries from 2025-06-11

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