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4COT

The importance of the Abn2 calcium cluster in the endo-1,5- arabinanase activity from Bacillus subtilis

Functional Information from GO Data
ChainGOidnamespacecontents
A0004553molecular_functionhydrolase activity, hydrolyzing O-glycosyl compounds
A0005975biological_processcarbohydrate metabolic process
Functional Information from PDB Data
site_idAC1
Number of Residues6
DetailsBINDING SITE FOR RESIDUE NI A 1470
ChainResidue
AHIS173
AGLN318
AHOH2017
AHOH2025
AHOH2138
AHOH2139

site_idAC2
Number of Residues10
DetailsBINDING SITE FOR RESIDUE TRS A 1471
ChainResidue
AVAL170
AASP171
AGLU224
ALEU246
AGLN318
AHOH2018
AHOH2305
AHIS37
AASP38
ATRP100

Functional Information from PROSITE/UniProt
site_idPS00867
Number of Residues8
DetailsCPSASE_2 Carbamoyl-phosphate synthase subdomain signature 2. ILEMNPKT
ChainResidueDetails
AILE195-THR202

Functional Information from SwissProt/UniProt
site_idSWS_FT_FI1
Number of Residues1
DetailsACT_SITE: Proton acceptor => ECO:0000305|PubMed:20883454
ChainResidueDetails
AASP38

site_idSWS_FT_FI2
Number of Residues1
DetailsACT_SITE: Proton donor => ECO:0000269|PubMed:20883454
ChainResidueDetails
AGLU224

site_idSWS_FT_FI3
Number of Residues3
DetailsBINDING: BINDING => ECO:0000250
ChainResidueDetails
AASP38
AASP122
AASN168

site_idSWS_FT_FI4
Number of Residues1
DetailsBINDING: BINDING => ECO:0000305|PubMed:20883454
ChainResidueDetails
ASER188

site_idSWS_FT_FI5
Number of Residues1
DetailsBINDING: BINDING => ECO:0000269|PubMed:20883454
ChainResidueDetails
AHIS220

site_idSWS_FT_FI6
Number of Residues1
DetailsBINDING: BINDING => ECO:0000255
ChainResidueDetails
AGLN318

site_idSWS_FT_FI7
Number of Residues1
DetailsSITE: Important for catalytic activity, responsible for pKa modulation of the active site Glu and correct orientation of both the proton donor and substrate => ECO:0000305|PubMed:20883454
ChainResidueDetails
AASP171

site_idSWS_FT_FI8
Number of Residues1
DetailsSITE: Important for substrate recognition
ChainResidueDetails
AGLN318

237992

PDB entries from 2025-06-25

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