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1EL4

STRUCTURE OF THE CALCIUM-REGULATED PHOTOPROTEIN OBELIN DETERMINED BY SULFUR SAS

Functional Information from GO Data
ChainGOidnamespacecontents
A0005509molecular_functioncalcium ion binding
A0008218biological_processbioluminescence
A0046872molecular_functionmetal ion binding
Functional Information from PDB Data
site_idAC1
Number of Residues4
DetailsBINDING SITE FOR RESIDUE CL A 196
ChainResidue
AARG112
ATHR172
AHOH301
AHOH303

site_idAC2
Number of Residues16
DetailsBINDING SITE FOR RESIDUE CTZ A 197
ChainResidue
ATRP92
ATRP114
AGLY115
APHE119
ATRP135
ATYR138
AMET171
AHIS175
ATRP179
ATYR190
AHOH239
AHIS22
AMET25
AILE42
AILE50
APHE88

Functional Information from PROSITE/UniProt
site_idPS00018
Number of Residues13
DetailsEF_HAND_1 EF-hand calcium-binding domain. DINGNGKITldEI
ChainResidueDetails
AASP30-ILE42
AASP123-TRP135
AASP159-MET171

Functional Information from SwissProt/UniProt
site_idSWS_FT_FI1
Number of Residues35
DetailsDomain: {"description":"EF-hand 1","evidences":[{"source":"PROSITE-ProRule","id":"PRU00448","evidenceCode":"ECO:0000255"}]}
ChainResidueDetails

site_idSWS_FT_FI2
Number of Residues35
DetailsDomain: {"description":"EF-hand 2","evidences":[{"source":"UniProtKB","id":"P02592","evidenceCode":"ECO:0000250"}]}
ChainResidueDetails

site_idSWS_FT_FI3
Number of Residues35
DetailsDomain: {"description":"EF-hand 3","evidences":[{"source":"PROSITE-ProRule","id":"PRU00448","evidenceCode":"ECO:0000255"}]}
ChainResidueDetails

site_idSWS_FT_FI4
Number of Residues35
DetailsDomain: {"description":"EF-hand 4","evidences":[{"source":"PROSITE-ProRule","id":"PRU00448","evidenceCode":"ECO:0000255"}]}
ChainResidueDetails

site_idSWS_FT_FI5
Number of Residues15
DetailsBinding site: {"evidences":[{"source":"PROSITE-ProRule","id":"PRU00448","evidenceCode":"ECO:0000255"}]}
ChainResidueDetails

Catalytic Information from CSA
site_idCSA1
Number of Residues5
DetailsAnnotated By Reference To The Literature 1qv0
ChainResidueDetails
AHIS175
ATYR138
AHIS22
ATRP92
ATYR190

site_idMCSA1
Number of Residues5
DetailsM-CSA 768
ChainResidueDetails
AHIS22electrostatic stabiliser, proton acceptor
ATRP92electrostatic stabiliser
ATYR138electrostatic stabiliser
AHIS175electrostatic stabiliser, proton acceptor
ATYR190electrostatic stabiliser, proton acceptor, proton donor, proton relay

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PDB entries from 2025-11-05

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