2BL5

Solution structure of the KH-QUA2 region of the Xenopus STAR-GSG Quaking protein.

Domain Annotation: SCOP Classification SCOP Database (version: 2.0) Homepage

Chains	Domain Info	Class	Fold	Superfamily	Family	Domain	Species
A	d2bl5a1	Alpha and beta proteins (a+b)	Eukaryotic type KH-domain (KH-domain type I)	Eukaryotic type KH-domain (KH-domain type I)	Eukaryotic type KH-domain (KH-domain type I)	Quaking protein A (Xqua)	AFRICAN CLAWED FROG (Xenopus laevis ) [TaxId: 8355 ]
A	d2bl5a2	Artifacts	Tags	Tags	Tags	C-terminal Tags	AFRICAN CLAWED FROG (Xenopus laevis ) [TaxId: 8355 ]

Domain Annotation: CATH CATH Database (version 4.2.0) Homepage

Chain	Domain	Class	Architecture	Topology	Homology
A	3.30.1370.10	Alpha Beta	2-Layer Sandwich	Ribosomal Protein S8	Chain: A, domain 1

Protein Family Annotation Pfam Database Homepage

Chains	Accession	Identifier	Description	Comments	Source
A	PF16551	Putative nuclear localisation signal of quaking (Quaking_NLS)	Putative nuclear localisation signal of quaking	Quaking_NLS is the very C-terminal region of quaking proteins that is purported to be the nuclear localisation signal [1,2].	Domain
A	PF16544	Homodimerisation region of STAR domain protein (STAR_dimer)	Homodimerisation region of STAR domain protein	This family is the homodimerisation domain of quaking proteins. Quaking-dimer is a helix-turn-helix dimer with an additional helix in the turn region. Dimerisation is required for adequate RNA-binding. Quaking is a prototypical member of the STAR (si ...	This family is the homodimerisation domain of quaking proteins. Quaking-dimer is a helix-turn-helix dimer with an additional helix in the turn region. Dimerisation is required for adequate RNA-binding. Quaking is a prototypical member of the STAR (signal transducer and activator of RNA) protein family, which plays key roles in post-transcriptional gene regulation by controlling mRNA translation, stability and splicing [1]. STAR_dimer is the homodimerisation domain, Qua1 of the STAR domain of a series of proteins referred to as STAR/GSG, or Signal Transduction and Activation of RNA/GRP33, Sam68, GLD-1 family. These are conserved in higher eukaryotes and are RNA-binding transcriptional regulators. The STAR domain is a KH domain flanked by two homologous regions, Qua1 and Qua2. Qua1, this family, is the homodimerisation domain, and the KH plus Qua2 is the RNA-binding region [2].	Domain
A	PF00013	KH domain (KH_1)	KH domain	KH motifs bind RNA in vitro. Autoantibodies to Nova, a KH domain protein, cause paraneoplastic opsoclonus ataxia.	Domain

Gene Product Annotation Gene Product Annotation

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
A	MGC83862 PROTEIN	binding protein binding identical protein binding nucleic acid binding RNA binding single-stranded RNA binding poly-pyrimidine tract binding poly(U) RNA binding organic cyclic compound binding heterocyclic compound binding		intracellular anatomical structure cytoplasm cytosol cellular anatomical entity nucleus organelle membrane-bounded organelle intracellular organelle intracellular membrane-bounded organelle

RCSB PDB is funded by the National Science Foundation (DBI-1832184), the US Department of Energy (DE-SC0019749), and the National Cancer Institute, National Institute of Allergy and Infectious Diseases, and National Institute of General Medical Sciences of the National Institutes of Health under grant R01GM133198.