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1BIF

6-PHOSPHOFRUCTO-2-KINASE/FRUCTOSE-2,6-BISPHOSPHATASE BIFUNCTIONAL ENZYME COMPLEXED WITH ATP-G-S AND PHOSPHATE

Functional Information from GO Data
ChainGOidnamespacecontents
A0000166molecular_functionnucleotide binding
A0003824molecular_functioncatalytic activity
A0003873molecular_function6-phosphofructo-2-kinase activity
A0004331molecular_functionfructose-2,6-bisphosphate 2-phosphatase activity
A0005524molecular_functionATP binding
A0005829cellular_componentcytosol
A0006000biological_processfructose metabolic process
A0006003biological_processfructose 2,6-bisphosphate metabolic process
A0006094biological_processgluconeogenesis
A0006096biological_processglycolytic process
A0016301molecular_functionkinase activity
A0016740molecular_functiontransferase activity
A0016787molecular_functionhydrolase activity
A0043540cellular_component6-phosphofructo-2-kinase/fructose-2,6-biphosphatase complex
A0046835biological_processcarbohydrate phosphorylation
Functional Information from PDB Data
site_idAC1
Number of Residues4
DetailsBINDING SITE FOR RESIDUE MG A 501
ChainResidue
ALYS51
ATHR52
AASP128
AAGS500

site_idAC2
Number of Residues9
DetailsBINDING SITE FOR RESIDUE PO4 A 510
ChainResidue
AHIS390
AGLN391
AHOH731
AHOH918
AARG255
AHIS256
AASN262
AARG305
AGLU325

site_idAC3
Number of Residues10
DetailsBINDING SITE FOR RESIDUE PO4 A 520
ChainResidue
ATYR336
AARG350
ALYS354
ATYR365
AGLN391
AARG395
AHOH728
AHOH730
AHOH737
AHOH915

site_idAC4
Number of Residues18
DetailsBINDING SITE FOR RESIDUE AGS A 500
ChainResidue
APRO47
AALA48
AARG49
AGLY50
ALYS51
ATHR52
ATYR53
AASN167
AGLN170
ALYS172
AVAL220
AVAL246
ATYR427
AMG501
AHOH660
AHOH688
AHOH908
AHOH909

site_idAC5
Number of Residues4
DetailsBINDING SITE FOR RESIDUE GOL A 530
ChainResidue
APHE299
ALEU323
AVAL375
AGLU378

Functional Information from PROSITE/UniProt
site_idPS00175
Number of Residues10
DetailsPG_MUTASE Phosphoglycerate mutase family phosphohistidine signature. LcRHGEsElN
ChainResidueDetails
ALEU253-ASN262

Functional Information from SwissProt/UniProt
site_idSWS_FT_FI1
Number of Residues219
DetailsRegion: {"description":"Fructose-2,6-bisphosphatase","evidences":[{"source":"PubMed","id":"1651918","evidenceCode":"ECO:0000305"}]}
ChainResidueDetails

site_idSWS_FT_FI2
Number of Residues2
DetailsActive site: {"evidences":[{"evidenceCode":"ECO:0000255"}]}
ChainResidueDetails

site_idSWS_FT_FI3
Number of Residues1
DetailsActive site: {"description":"Tele-phosphohistidine intermediate","evidences":[{"source":"PubMed","id":"9890980","evidenceCode":"ECO:0000269"}]}
ChainResidueDetails

site_idSWS_FT_FI4
Number of Residues1
DetailsActive site: {"description":"Proton donor/acceptor","evidences":[{"source":"PubMed","id":"9890980","evidenceCode":"ECO:0000269"}]}
ChainResidueDetails

site_idSWS_FT_FI5
Number of Residues14
DetailsBinding site: {"evidences":[{"source":"PubMed","id":"8805587","evidenceCode":"ECO:0000269"}]}
ChainResidueDetails

site_idSWS_FT_FI6
Number of Residues11
DetailsBinding site: {"evidences":[{"source":"PubMed","id":"9890980","evidenceCode":"ECO:0000269"}]}
ChainResidueDetails

site_idSWS_FT_FI7
Number of Residues6
DetailsBinding site: {"evidences":[{"source":"UniProtKB","id":"Q16875","evidenceCode":"ECO:0000250"}]}
ChainResidueDetails

site_idSWS_FT_FI8
Number of Residues7
DetailsBinding site: {"evidences":[{"source":"UniProtKB","id":"P07953","evidenceCode":"ECO:0000250"}]}
ChainResidueDetails

site_idSWS_FT_FI9
Number of Residues1
DetailsSite: {"description":"Transition state stabilizer","evidences":[{"source":"UniProtKB","id":"P00950","evidenceCode":"ECO:0000250"}]}
ChainResidueDetails

site_idSWS_FT_FI10
Number of Residues1
DetailsModified residue: {"description":"Phosphothreonine; by PKC","evidences":[{"evidenceCode":"ECO:0000255"}]}
ChainResidueDetails

Catalytic Information from CSA
site_idCSA1
Number of Residues4
DetailsAnnotated By Reference To The Literature 1qhf
ChainResidueDetails
AGLU325
AHIS390
AARG305
AHIS256

site_idCSA2
Number of Residues6
DetailsAnnotated By Reference To The Literature 1qhf
ChainResidueDetails
AGLU325
AASN262
AHIS390
AARG255
AARG305
AHIS256

site_idMCSA1
Number of Residues6
DetailsM-CSA 810
ChainResidueDetails
AARG255electrostatic stabiliser
AHIS256covalently attached, nucleofuge, nucleophile
AASN262electrostatic stabiliser
AARG305electrostatic stabiliser
AGLU325activator, proton acceptor, proton donor
AHIS390electrostatic stabiliser

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PDB entries from 2025-10-22

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