Domain Annotation: SCOP2 Classification SCOP2 Database Homepage

ChainsTypeFamily Name Domain Identifier Family IdentifierProvenance Source (Version)
ASCOP2B SuperfamilyNucleotide cyclase/DNA polymerase palm domain-like 8101834 3001272 SCOP2B (2022-06-29)
ASCOP2B SuperfamilyLesion bypass DNA polymerase (Y-family), little finger domain 8101833 3000579 SCOP2B (2022-06-29)
ASCOP2B SuperfamilyNucleotide cyclase/DNA polymerase palm domain-like 8101834 3001272 SCOP2B (2022-06-29)
ASCOP2B SuperfamilyTa1206-like 8101835 3001431 SCOP2B (2022-06-29)

Domain Annotation: ECOD Classification ECOD Database Homepage

ChainsFamily NameDomain Identifier ArchitecturePossible HomologyHomologyTopologyFamilyProvenance Source (Version)
AKOG2095_1ste4ecsA4 A: alpha arraysX: HhH/H2THH: SAM/DNA-glycosylaseT: SAM domain-likeF: KOG2095_1stECOD (1.6)
AIMS_Ce4ecsA2 A: a+b two layersX: Reverse ferredoxinH: Lesion bypass DNA polymerase (Y-family), little finger domain (From Topology)T: Lesion bypass DNA polymerase (Y-family), little finger domainF: IMS_CECOD (1.6)
AIMSe4ecsA1 A: a+b two layersX: Alpha-beta plaitsH: Adenylyl and guanylyl cyclase catalytic domain-likeT: Adenylyl and guanylyl cyclase catalytic domain-likeF: IMSECOD (1.6)
AIMS_1e4ecsA3 A: a+b three layersX: Hypothetical protein Ta1206-like (From Topology)H: Hypothetical protein Ta1206-like (From Topology)T: Hypothetical protein Ta1206-likeF: IMS_1ECOD (1.6)

Domain Annotation: CATH CATH Database Homepage

ChainDomainClassArchitectureTopologyHomologyProvenance Source (Version)
A3.30.70.270 Alpha Beta 2-Layer Sandwich Alpha-Beta Plaits Reverse transcriptase/Diguanylate cyclase domainCATH (4.3.0)
A3.40.1170.60 Alpha Beta 3-Layer(aba) Sandwich MutS, DNA mismatch repair protein, domain I CATH (4.3.0)
A1.10.150.20 Mainly Alpha Orthogonal Bundle DNA polymerase domain 1CATH (4.3.0)
A3.30.1490.100 Alpha Beta 2-Layer Sandwich Dna Ligase domain 1CATH (4.3.0)

Protein Family Annotation Pfam Database Homepage

ChainsAccessionNameDescriptionCommentsSource
PF00817impB/mucB/samB family (IMS)impB/mucB/samB family- Family
PF21704DNApol eta/Rev1, HhH motif (POLH-Rev1_HhH)DNApol eta/Rev1, HhH motif- Motif
PF11799impB/mucB/samB family C-terminal domain (IMS_C)impB/mucB/samB family C-terminal domainThese proteins are involved in UV protection (Swiss).Domain

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

ChainsPolymerMolecular FunctionBiological ProcessCellular Component
DNA polymerase eta
C [auth P]DNA (5'-D(*AP*GP*CP*GP*TP*CP*AP*TP*A)-3')---
B [auth T]DNA (5'-D(*CP*AP*TP*TP*AP*TP*GP*AP*CP*GP*CP*T)-3')---

Structure Motif Annotation: Mechanism and Catalytic Site Atlas M-CSA Database Homepage

ChainsEnzyme NameDescriptionCatalytic Residues
DNA polymerase eta  M-CSA #975

DNA polymerase eta is a translesion synthesis (TLS) polymerase. The TLS polymerases are an important part of the DNA synthesis pathway which aid in resistance to DNA damage. They are crucial in overcoming DNA damage in cells by bypassing DNA damage lesions during DNA replication, which may otherwise stall the replication fork and lead to cell death. Eta polymerases are of interest because when mutated, can lead to cancer and are implicated as causes of antibiotic and chemotherapy resistance.

Defined by 9 residues: ASP:A-16 [auth A-13]MET:A-17 [auth A-14]TYR:A-55 [auth A-52]ARG:A-58 [auth A-55]ARG:A-64 [auth A-61]SER:A-116 [auth A-113]ASP:A-118 [auth A-115]GLU:A-119 [auth A-116]LYS:A-234 [auth A-231]
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