1p5s | pdb_00001p5s

STRUCTURE AND FUNCTION OF THE CALPONIN-HOMOLOGY DOMAIN OF AN IQGAP PROTEIN FROM SCHIZOSACCHAROMYCES POMBE

spinqualitylabelsall models 1p5s, resolution 2.22Å Show:Asymmetric Unit Biological Assembly Drag the structure with the mouse to rotate   Export Animated Image   Print3D Structural highlights 1p5s is a 1 chain structure with sequence from Cbs 356. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance. Ligands: HG Related: 1p2x Gene: RNG2 OR SPAC4F8.13C (CBS 356) Resources: FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT Function [RNG2_SCHPO] Required for cytokinesis. Component of the contractile F-actin ring; required for its construction following assembly of F-actin at the division site. Evolutionary Conservation Check, as determined by ConSurfDB. You may read the explanation of the method and the full data available from ConSurf. Publication Abstract from PubMed Schizosaccharomyces pombe Rng2 is an IQGAP protein that is essential for the assembly of an actomyosin ring during cytokinesis. Rng2 contains an amino-terminal calponin-homology (CH) domain, 11 IQ repeats and a RasGAP-homology domain. CH domains are known mainly for their ability to bind F-actin, although they have other ligands in vivo and there are only few examples of actin-binding single CH domains. The structures of several CH domains have already been reported, but this is only the third report of an actin-binding protein that contains a single CH domain (the structures of calponin and EB1 have been reported previously). The 2.21 A resolution crystal structure of the amino-terminal 190 residues of Rng2 from Br- and Hg-derivatives includes 40 residues (150-190) carboxyl-terminal to the CH domain that resemble neither the extended conformation seen in utrophin, nor the compact conformation seen in fimbrin, although residues 154-160 form an unstructured coil which adopts a substructure similar to dystrophin residues 240-246 in the carboxyl-terminal portion of the CH2 domain. This region wraps around the stretch of residues that would be equivalent to the proposed actin-binding site ABS1 and ABS2 from dystrophin. This distinctive feature is absent from previously published CH-domain structures. Another feature revealed by comparing the two derivatives is the presence of two loop conformations between Tyr92 and Arg99. Structure, crystal packing and molecular dynamics of the calponin-homology domain of Schizosaccharomyces pombe Rng2.,Wang CH, Balasubramanian MK, Dokland T Acta Crystallogr D Biol Crystallogr. 2004 Aug;60(Pt 8):1396-403. Epub 2004, Jul 21. PMID:15272162 From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.

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