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2F8P

Crystal structure of obelin following Ca2+ triggered bioluminescence suggests neutral coelenteramide as the primary excited state

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 Residues6
DetailsBINDING SITE FOR RESIDUE CA A 301
ChainResidue
AASP30
AASN32
AASN34
ALYS36
AGLU41
AHOH1609

site_idAC2
Number of Residues6
DetailsBINDING SITE FOR RESIDUE CA A 302
ChainResidue
ATHR129
AGLU134
AHOH1592
AASP123
AASP125
ASER127

site_idAC3
Number of Residues6
DetailsBINDING SITE FOR RESIDUE CA A 303
ChainResidue
AASP159
AASP161
ASER163
AASP165
AGLU170
AHOH1642

site_idAC4
Number of Residues18
DetailsBINDING SITE FOR RESIDUE CEI A 1526
ChainResidue
AHIS22
AMET25
APHE28
ALEU29
AALA46
AILE50
APHE72
APHE88
ATRP92
ATRP114
AGLY115
AVAL118
AMET171
AHIS175
ATRP179
ATYR190
AHOH1528
AHOH1531

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 Residues15
DetailsBINDING: BINDING => ECO:0000255|PROSITE-ProRule:PRU00448
ChainResidueDetails
AASP30
AGLU134
AASP159
AASP161
ASER163
AASP165
AGLU170
AASN32
AASN34
ALYS36
AGLU41
AASP123
AASP125
ASER127
ATHR129

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 2024-09-18

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