Domain Annotation: SCOP2 Classification SCOP2 Database Homepage

ChainsTypeFamily Name Domain Identifier Family IdentifierProvenance Source (Version)
A [auth X]SCOP2B SuperfamilyPUA domain-like 8087511 3001015 SCOP2B (2022-06-29)
B [auth A]SCOP2B SuperfamilyPUA domain-like 8087511 3001015 SCOP2B (2022-06-29)

Domain Annotation: ECOD Classification ECOD Database Homepage

ChainsFamily NameDomain Identifier ArchitecturePossible HomologyHomologyTopologyFamilyProvenance Source (Version)
A [auth X]SAD_SRAe3q0cX1 A: beta barrelsX: cradle loop barrelH: RIFT-relatedT: PUA domainF: SAD_SRAECOD (1.6)
B [auth A]SAD_SRAe3q0cA1 A: beta barrelsX: cradle loop barrelH: RIFT-relatedT: PUA domainF: SAD_SRAECOD (1.6)

Domain Annotation: CATH CATH Database Homepage

ChainDomainClassArchitectureTopologyHomologyProvenance Source (Version)
A [auth X]2.30.280.10 Mainly Beta Roll PUA domain-like SRA-YDGCATH (4.3.0)
B [auth A]2.30.280.10 Mainly Beta Roll PUA domain-like SRA-YDGCATH (4.3.0)

Protein Family Annotation Pfam Database Homepage

ChainsAccessionNameDescriptionCommentsSource
A [auth X],
B [auth A]
PF02182SAD/SRA domain (SAD_SRA)SAD/SRA domainThe domain goes by several names including SAD [1], SRA [2] and YDG [3]. It adopts a beta barrel, modified PUA-like, fold that is widely present in eukaryotic chromatin proteins and in bacteria [4]. Versions of this domain are known to bind hemi-m ...The domain goes by several names including SAD [1], SRA [2] and YDG [3]. It adopts a beta barrel, modified PUA-like, fold that is widely present in eukaryotic chromatin proteins and in bacteria [4]. Versions of this domain are known to bind hemi-methylated CpG dinucleotides and also other 5mC containing dinucleotides. The domain binds DNA by flipping out the methylated cytosine base from the DNA double helix [5].The conserved tyrosine and aspartate residues and a glycine rich patch are critical for recognition of the flipped out base [4][5]. Mammalian UHRF1 that contains this domain plays an important role in maintenance of methylation at CpG dinucleotides by recruiting DNMT1 to hemimethylated sites associated with replication forks [2]. The SAD/SRA domain has been combined with other domains involved in the ubiquitin pathway on multiple occasions and such proteins link recognition of DNA methylation to chromatin-protein ubiquitination [4]. The domain is also found in species that lack DNA methylation, such as certain apicomplexans, suggestive of other DNA-binding modes or functions [4]. A highly derived and distinct version of the domain is also found in fungi where it is fused to AlkB-type 2OGFeDO domains [6]. In bacteria, the domain is usually fused or associated with restriction endonucleases, many of which target methylated or hemi-methylated DNA [4].
Domain

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

ChainsPolymerMolecular FunctionBiological ProcessCellular Component
A [auth X],
B [auth A]
Histone-lysine N-methyltransferase, H3 lysine-9 specific SUVH5
C,
D [auth B]
DNA (5'-D(*AP*CP*TP*AP*(5CM)P*GP*TP*AP*GP*TP*T)-3')---