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    Nat Struct Biol. 2003 Mar;10(3):226-31.

    Crystal structure of a MARCKS peptide containing the calmodulin-binding domain in complex with Ca2+-calmodulin.

    Yamauchi E, Nakatsu T, Matsubara M, Kato H, Taniguchi H.

    Harima Institute at SPring-8, RIKEN, 1-1-1 Kouto, Sayo, Hyogo 679-5148, Japan.

    The calmodulin-binding domain of myristoylated alanine-rich C kinase substrate (MARCKS), which interacts with various targets including calmodulin, actin and membrane lipids, has been suggested to function as a crosstalk point among several signal transduction pathways. We present here the crystal structure at 2 A resolution of a peptide consisting of the MARCKS calmodulin (CaM)-binding domain in complex with Ca2+-CaM. The domain assumes a flexible conformation, and the hydrophobic pocket of the calmodulin N-lobe, which is a common CaM-binding site observed in previously resolved Ca2+-CaM-target peptide complexes, is not involved in the interaction. The present structure presents a novel target-recognition mode of calmodulin and provides insight into the structural basis of the flexible interaction module of MARCKS.

    PMID: 12577052 [PubMed - indexed for MEDLINE]

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