4f14 | pdb_00004f14

Structure of the SH3 domain of human nebulette in complex with a peptide of XIRP2

spinqualitylabelsall models 4f14, resolution 1.20Å Show:Asymmetric Unit Biological Assembly Drag the structure with the mouse to rotate   Export Animated Image   Print3D Structural highlights 4f14 is a 2 chain structure with sequence from Human. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance. Ligands: ZN Gene: NEBL (HUMAN) Resources: FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT Function [NEBL_HUMAN] Binds to actin and plays an important role in the assembly of the Z-disk. Isoform 2 might play a role in the assembly of focal adhesion. [XIRP2_HUMAN] Protects actin filaments from depolymerization. Publication Abstract from PubMed The Xin actin-binding repeat-containing proteins Xin and XIRP2 are exclusively expressed in striated muscle cells, where they are believed to play an important role in development. In adult muscle, both proteins are concentrated at attachment sites of myofibrils to the membrane. In contrast, during development they are localized to immature myofibrils together with their binding partner, filamin C, indicating an involvement of both proteins in myofibril assembly. We identify the SH3 domains of nebulin and nebulette as novel ligands of proline-rich regions of Xin and XIRP2. Precise binding motifs are mapped and shown to bind both SH3 domains with micromolar affinity. Cocrystallization of the nebulette SH3 domain with the interacting XIRP2 peptide PPPTLPKPKLPKH reveals selective interactions that conform to class II SH3 domain-binding peptides. Bimolecular fluorescence complementation experiments in cultured muscle cells indicate a temporally restricted interaction of Xin-repeat proteins with nebulin/nebulette during early stages of myofibril development that is lost upon further maturation. In mature myofibrils, this interaction is limited to longitudinally oriented structures associated with myofibril development and remodeling. These data provide new insights into the role of Xin actin-binding repeat-containing proteins (together with their interaction partners) in myofibril assembly and after muscle damage. Identification of Xin-repeat proteins as novel ligands of the SH3 domains of nebulin and nebulette and analysis of their interaction during myofibril formation and remodeling.,Eulitz S, Sauer F, Pelissier MC, Boisguerin P, Molt S, Schuld J, Orfanos Z, Kley RA, Volkmer R, Wilmanns M, Kirfel G, van der Ven PF, Furst DO Mol Biol Cell. 2013 Oct;24(20):3215-26. doi: 10.1091/mbc.E13-04-0202. Epub 2013, Aug 28. PMID:23985323 From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.

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