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4XHX

Crystal structure of the NanB sialidase from streptococcus pneumoniae in complex with Optactin and 2-[(3-Chlorobenzyl)ammonio]ethanesulfonate

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 Residues17
Detailsbinding site for residue JKK A 701
ChainResidue
AARG245
ATYR489
AARG557
AARG619
ATYR653
ATRP674
AHOH1078
AHOH1240
AHOH915
AASP270
ASER271
AILE326
AASP327
AASP344
AMET346
AGLY351
AASN352

site_idAC2
Number of Residues11
Detailsbinding site for residue OPX A 702
ChainResidue
ATYR250
ATHR251
AGLN494
ALYS499
AILE596
ATHR657
AGLU658
AHOH1137
AHOH889
AHOH992
AHOH1139

site_idAC3
Number of Residues5
Detailsbinding site for residue DMS A 703
ChainResidue
APHE105
AARG107
AGLU115
AHOH903
AHOH1083

site_idAC4
Number of Residues5
Detailsbinding site for residue DMS A 704
ChainResidue
APHE294
AALA295
AMET296
ALYS297
ATRP471

site_idAC5
Number of Residues4
Detailsbinding site for residue DMS A 705
ChainResidue
ASER317
AGLN600
AHIS662
AHOH1456

Functional Information from SwissProt/UniProt
site_idSWS_FT_FI1
Number of Residues11
DetailsRepeat: {"description":"BNR 1"}
ChainResidueDetails

site_idSWS_FT_FI2
Number of Residues11
DetailsRepeat: {"description":"BNR 2"}
ChainResidueDetails

site_idSWS_FT_FI3
Number of Residues11
DetailsRepeat: {"description":"BNR 3"}
ChainResidueDetails

site_idSWS_FT_FI4
Number of Residues11
DetailsRepeat: {"description":"BNR 4"}
ChainResidueDetails

site_idSWS_FT_FI5
Number of Residues1
DetailsActive site: {"description":"Proton acceptor","evidences":[{"evidenceCode":"ECO:0000250"}]}
ChainResidueDetails

site_idSWS_FT_FI6
Number of Residues1
DetailsActive site: {"evidences":[{"evidenceCode":"ECO:0000255"}]}
ChainResidueDetails

site_idSWS_FT_FI7
Number of Residues1
DetailsActive site: {"description":"Nucleophile","evidences":[{"evidenceCode":"ECO:0000250"}]}
ChainResidueDetails

site_idSWS_FT_FI8
Number of Residues3
DetailsBinding site: {"evidences":[{"evidenceCode":"ECO:0000250"}]}
ChainResidueDetails

248636

PDB entries from 2026-02-04

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