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1KMS

HUMAN DIHYDROFOLATE REDUCTASE COMPLEXED WITH NADPH AND 6-([5-QUINOLYLAMINO]METHYL)-2,4-DIAMINO-5-METHYLPYRIDO[2,3-D]PYRIMIDINE (SRI-9439), A LIPOPHILIC ANTIFOLATE

Functional Information from GO Data
ChainGOidnamespacecontents
A0000900molecular_functionmRNA regulatory element binding translation repressor activity
A0003723molecular_functionRNA binding
A0003729molecular_functionmRNA binding
A0004146molecular_functiondihydrofolate reductase activity
A0005515molecular_functionprotein binding
A0005542molecular_functionfolic acid binding
A0005737cellular_componentcytoplasm
A0005739cellular_componentmitochondrion
A0005829cellular_componentcytosol
A0006729biological_processtetrahydrobiopterin biosynthetic process
A0006730biological_processone-carbon metabolic process
A0008144molecular_functionobsolete drug binding
A0016491molecular_functionoxidoreductase activity
A0017148biological_processnegative regulation of translation
A0031103biological_processaxon regeneration
A0031427biological_processresponse to methotrexate
A0046452biological_processdihydrofolate metabolic process
A0046653biological_processtetrahydrofolate metabolic process
A0046654biological_processtetrahydrofolate biosynthetic process
A0046655biological_processfolic acid metabolic process
A0050661molecular_functionNADP binding
A0070402molecular_functionNADPH binding
A1990825molecular_functionsequence-specific mRNA binding
A2000121biological_processregulation of removal of superoxide radicals
Functional Information from PDB Data
site_idAC1
Number of Residues4
DetailsBINDING SITE FOR RESIDUE SO4 A 203
ChainResidue
APRO61
AGLU62
AHOH500
AHOH524

site_idAC2
Number of Residues7
DetailsBINDING SITE FOR RESIDUE SO4 A 204
ChainResidue
AHOH658
AHOH695
AARG28
ALYS68
AGLY69
AHOH375
AHOH608

site_idAC3
Number of Residues12
DetailsBINDING SITE FOR RESIDUE LIH A 201
ChainResidue
AILE7
AVAL8
AGLU30
APHE31
APHE34
APRO61
AVAL115
ATYR121
ANDP202
AHOH302
AHOH343
AHOH401

site_idAC4
Number of Residues38
DetailsBINDING SITE FOR RESIDUE NDP A 202
ChainResidue
AVAL8
AALA9
AILE16
AGLY17
ALYS18
AGLY20
AASP21
ALEU22
ATRP24
AGLY53
ALYS54
ALYS55
ATHR56
ALEU75
ASER76
AARG77
AGLU78
AARG91
ALYS98
AVAL115
AGLY117
ASER118
ASER119
AVAL120
ATYR121
AGLU123
ATHR146
ALIH201
AHOH317
AHOH339
AHOH389
AHOH400
AHOH401
AHOH435
AHOH581
AHOH584
AHOH643
AHOH689

Functional Information from PROSITE/UniProt
site_idPS00075
Number of Residues24
DetailsDHFR_1 Dihydrofolate reductase (DHFR) domain signature. GIGkngdLPWpplrnEfryFqrmT
ChainResidueDetails
AGLY15-THR38

Functional Information from SwissProt/UniProt
site_idSWS_FT_FI1
Number of Residues181
DetailsDomain: {"description":"DHFR","evidences":[{"source":"PROSITE-ProRule","id":"PRU00660","evidenceCode":"ECO:0000255"}]}
ChainResidueDetails

site_idSWS_FT_FI2
Number of Residues18
DetailsBinding site: {"evidences":[{"source":"PubMed","id":"15039552","evidenceCode":"ECO:0000269"},{"source":"PubMed","id":"16222560","evidenceCode":"ECO:0000269"},{"source":"PubMed","id":"19478082","evidenceCode":"ECO:0000269"}]}
ChainResidueDetails

site_idSWS_FT_FI3
Number of Residues7
DetailsBinding site: {"evidences":[{"source":"PubMed","id":"2248959","evidenceCode":"ECO:0000305"}]}
ChainResidueDetails

Catalytic Information from CSA
site_idCSA1
Number of Residues2
DetailsAnnotated By Reference To The Literature 1dhf
ChainResidueDetails
ALEU22
AGLU30

site_idMCSA1
Number of Residues2
DetailsM-CSA 490
ChainResidueDetails
ALEU22electrostatic stabiliser
AGLU30electrostatic stabiliser

238895

PDB entries from 2025-07-16

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