Structure of PDB 4iem Chain A

Receptor sequence
>4iemA (length=278) Species: 9606 (Homo sapiens) [Search protein sequence]
GPALYEDPPDQKTSPSGKPATLKICSWNVDGLRAWIKKKGLDWVKEEAPD
ILCLQETKCSENKLPAELQELPGLSHQYWSAPSDKEGYSGVGLLSRQCPL
KVSYGIGDEEHDQEGRVIVAEFDSFVLVTAYVPNAGRGLVRLEYRQRWDE
AFRKFLKGLASRKPLVLCGDLNVAHEEIDLRNPKGNKKNAGFTPQERQGF
GELLQAVPLADSFRHLYPNTPYAYTFWTYMMNARSKNVGWRLDYFLLSHS
LLPALCDSKIRSKALGSDHCPITLYLAL
3D structure
PDB4iem Conserved Structural Chemistry for Incision Activity in Structurally Non-homologous Apurinic/Apyrimidinic Endonuclease APE1 and Endonuclease IV DNA Repair Enzymes.
ChainA
Resolution2.3936 Å
3D
structure
Catalytic site residues are labeled in the structure
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Enzymatic activity
Catalytic site (original residue number in PDB) N68 D70 E96 Y171 D210 N212 D283 D308 H309
Catalytic site (residue number reindexed from 1) N28 D30 E56 Y131 D170 N172 D243 D268 H269
Enzyme Commision number 3.1.11.2: exodeoxyribonuclease III.
3.1.21.-
Interaction with ligand
Site
#		 Ligand Ligand
chain		 Binding residues on receptor
(original residue number in PDB)		 Binding residues on receptor
(residue number reindexed from 1)		 Binding affinity
BS01 dna A E96 Y128 Y171 R181 E56 Y88 Y131 R141
BS02 dna A Y171 N174 R177 D210 N212 N226 N229 M271 V278 L282 H309 Y131 N134 R137 D170 N172 N186 N189 M231 V238 L242 H269
BS03 dna A G71 R73 A74 E126 Y269 M270 M271 G31 R33 A34 E86 Y229 M230 M231
Gene Ontology
Molecular Function
GO:0003677 DNA binding
GO:0003684 damaged DNA binding
GO:0003691 double-stranded telomeric DNA binding
GO:0003713 transcription coactivator activity
GO:0003714 transcription corepressor activity
GO:0003723 RNA binding
GO:0003824 catalytic activity
GO:0003906 DNA-(apurinic or apyrimidinic site) endonuclease activity
GO:0004518 nuclease activity
GO:0004519 endonuclease activity
GO:0004520 DNA endonuclease activity
GO:0004523 RNA-DNA hybrid ribonuclease activity
GO:0004527 exonuclease activity
GO:0004528 phosphodiesterase I activity
GO:0004844 uracil DNA N-glycosylase activity
GO:0005515 protein binding
GO:0008081 phosphoric diester hydrolase activity
GO:0008296 3'-5'-DNA exonuclease activity
GO:0008309 double-stranded DNA exodeoxyribonuclease activity
GO:0008311 double-stranded DNA 3'-5' DNA exonuclease activity
GO:0008408 3'-5' exonuclease activity
GO:0016491 oxidoreductase activity
GO:0016890 site-specific endodeoxyribonuclease activity, specific for altered base
GO:0031490 chromatin DNA binding
GO:0046872 metal ion binding
GO:0052720 class II DNA-(apurinic or apyrimidinic site) endonuclease activity
GO:0090580 phosphodiesterase activity, acting on 3'-phosphoglycolate-terminated DNA strands
GO:0140431 DNA-(abasic site) binding
Biological Process
GO:0000723 telomere maintenance
GO:0006281 DNA repair
GO:0006284 base-excision repair
GO:0006287 base-excision repair, gap-filling
GO:0006308 DNA catabolic process
GO:0006310 DNA recombination
GO:0042981 regulation of apoptotic process
GO:0043488 regulation of mRNA stability
GO:0044029 positive regulation of gene expression via chromosomal CpG island demethylation
GO:0045454 cell redox homeostasis
GO:0045892 negative regulation of DNA-templated transcription
GO:0045944 positive regulation of transcription by RNA polymerase II
GO:0097698 telomere maintenance via base-excision repair
Cellular Component
GO:0000781 chromosome, telomeric region
GO:0005634 nucleus
GO:0005654 nucleoplasm
GO:0005730 nucleolus
GO:0005737 cytoplasm
GO:0005739 mitochondrion
GO:0005783 endoplasmic reticulum
GO:0005813 centrosome
GO:0005840 ribosome
GO:0016607 nuclear speck
GO:0048471 perinuclear region of cytoplasm

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Molecular Function
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Biological Process
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Cellular Component
External links
PDB RCSB:4iem, PDBe:4iem, PDBj:4iem
PDBsum4iem
PubMed23355472
UniProtP27695|APEX1_HUMAN DNA repair nuclease/redox regulator APEX1 (Gene Name=APEX1)

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