2xub | pdb_00002xub

HUMAN RPC62 SUBUNIT STRUCTURE

spinqualitylabelsall models 2xub, resolution 2.80Å Show:Asymmetric Unit Biological Assembly Drag the structure with the mouse to rotate   Export Animated Image   Print3D Structural highlights 2xub is a 1 chain structure with sequence from Homo sapiens. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance. Related: 2xv4 Resources: FirstGlance, OCA, RCSB, PDBsum Publication Abstract from PubMed The 17-subunit human RNA polymerase III (hPol III) transcribes small, untranslated RNA genes that are involved in the regulation of transcription, splicing and translation. hPol III subunits hRPC62, hRPC39 and hRPC32 form a stable ternary subcomplex required for promoter-specific transcription initiation by hPol III. Here, we report the crystal structure of hRPC62. This subunit folds as a four-tandem extended winged helix (eWH) protein that is structurally related to the transcription factor TFIIEalpha N terminus. Through biochemical analyses, we mapped the protein-protein interactions of hRPC62, hRPC32 and hRPC39. In addition, we demonstrated that hRPC62 and hRPC39 bind single-stranded and duplex DNA, respectively, in a sequence-independent manner. Overall, we shed light on structural similarities between the hPol III-specific subunit hRPC62 and TFIIEalpha and propose specific functions for hRPC39 and hRPC62 in transcription initiation by hPol III. Structure-function analysis of hRPC62 provides insights into RNA polymerase III transcription initiation.,Lefevre S, Dumay-Odelot H, El-Ayoubi L, Budd A, Legrand P, Pinaud N, Teichmann M, Fribourg S Nat Struct Mol Biol. 2011 Mar;18(3):352-8. Epub 2011 Feb 27. PMID:21358628 From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine. See Also RNA polymerase

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