1wm4
From Proteopedia
Solution structure of mouse coactosin, an actin filament binding protein
Structural highlights
Function[COTL1_MOUSE] Binds to F-actin in a calcium-independent manner. Has no direct effect on actin depolymerization.[1] 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 PubMedCoactosin is a small (MW approximately 15 kDa) evolutionarily conserved actin filament binding protein. It displays remote sequence homology to ADF/cofilin proteins and to the ADF-H domains of twinfilin and Abp1/drebrin. However, biochemical analyses have demonstrated that coactosin has a very different role in actin dynamics from the ones of ADF/cofilin, twinfilin or Abp1/drebrin. To elucidate the molecular mechanism of coactosin/actin interaction, we determined the three-dimensional structure of mouse coactosin by multidimensional NMR spectroscopy. We find that the coactosin structure is homologous to ADF/cofilin and to the ADF-H domains of twinfilin. Furthermore, the regions that have been shown to be important for actin filament interactions in ADF/cofilins are structurally conserved in coactosin suggesting that these two proteins interact with F-actin through a conserved interface. Our analysis also identifies key structural differences between these proteins that may account for the differences in biochemical activities and cellular roles of these proteins. Solution structure of coactosin reveals structural homology to ADF/cofilin family proteins.,Hellman M, Paavilainen VO, Naumanen P, Lappalainen P, Annila A, Permi P FEBS Lett. 2004 Oct 8;576(1-2):91-6. PMID:15474017[2] From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine. References
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