3zuz | pdb_00003zuz

Structure of Shq1p C-terminal domain

spinqualitylabelsall models 3zuz, resolution 1.50Å Show:Asymmetric Unit Biological Assembly Drag the structure with the mouse to rotate   Export Animated Image   Print3D Structural highlights 3zuz is a 1 chain structure with sequence from Baker's yeast. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance. Ligands: IPA NonStd Res: CME Related: 3zv0 Resources: FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT Function [SHQ1_YEAST] Involved in the early biogenesis steps of box H/ACA snoRNP assembly. Publication Abstract from PubMed SHQ1 is an essential assembly factor for H/ACA ribonucleoproteins (RNPs) required for ribosome biogenesis, pre-mRNA splicing, and telomere maintenance. SHQ1 binds dyskerin/NAP57, the catalytic subunit of human H/ACA RNPs, and this interaction is modulated by mutations causing X-linked dyskeratosis congenita. We report the crystal structure of the C-terminal domain of yeast SHQ1, Shq1p, and its complex with yeast dyskerin/NAP57, Cbf5p, lacking its catalytic domain. The C-terminal domain of Shq1p interacts with the RNA-binding domain of Cbf5p and, through structural mimicry, uses the RNA-protein-binding sites to achieve a specific protein-protein interface. We propose that Shq1p operates as a Cbf5p chaperone during RNP assembly by acting as an RNA placeholder, thereby preventing Cbf5p from nonspecific RNA binding before association with an H/ACA RNA and the other core RNP proteins. The H/ACA RNP assembly factor SHQ1 functions as an RNA mimic.,Walbott H, Machado-Pinilla R, Liger D, Blaud M, Rety S, Grozdanov PN, Godin K, van Tilbeurgh H, Varani G, Meier UT, Leulliot N Genes Dev. 2011 Nov 15;25(22):2398-408. PMID:22085966 From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.

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