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1ksr

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[[Image:1ksr.gif|left|200px]]
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{{STRUCTURE_1ksr| PDB=1ksr | SCENE= }}
{{STRUCTURE_1ksr| PDB=1ksr | SCENE= }}
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'''THE REPEATING SEGMENTS OF THE F-ACTIN CROSS-LINKING GELATION FACTOR (ABP-120) HAVE AN IMMUNOGLOBULIN FOLD, NMR, 20 STRUCTURES'''
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===THE REPEATING SEGMENTS OF THE F-ACTIN CROSS-LINKING GELATION FACTOR (ABP-120) HAVE AN IMMUNOGLOBULIN FOLD, NMR, 20 STRUCTURES===
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==Overview==
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The 120,000 M(r) gelation factor and alpha-actinin are among the most abundant F-actin cross-linking proteins in Dictyostelium discoideum. Both molecules are rod-shaped homodimers. Each monomer chain is comprised of an actin-binding domain and a rod domain. The rod domain of the gelation factor consists of six 100-residue repetitive segments with high internal homology. We have now determined the three-dimensional structure of segment 4 of the rod domain of the gelation factor from D. discoideum using NMR spectroscopy. The segment consists of seven beta-sheets arranged in an immunoglobulin-like (Ig) fold. This is completely different from the alpha-actinin rod domain which consists of four spectrin-like alpha-helical segments. The gelation factor is the first example of an Ig-fold found in an actin-binding protein. Two highly homologous actin-binding proteins from human with similar sequences to the gelation factor, filamin and a 280,000 M(r) actin-binding protein (ABP-280), share conserved residues that form the core of the gelation factor repetitive segment structure. Thus, the segment 4 structure should be common to this subfamily of the spectrin superfamily. The structure of segment 4 together with previously published electron microscopy data, provide an explanation for the dimerization of the whole gelation factor molecule.
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{{ABSTRACT_PUBMED_9164464}}
==About this Structure==
==About this Structure==
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1KSR is a [[Single protein]] structure of sequence from [http://en.wikipedia.org/wiki/Dictyostelium_discoideum Dictyostelium discoideum]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1KSR OCA].
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1KSR is a [[Single protein]] structure of sequence from [http://en.wikipedia.org/wiki/Dictyostelium_discoideum Dictyostelium discoideum]. Full experimental information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1KSR OCA].
==Reference==
==Reference==
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[[Category: Immunoglobulin]]
[[Category: Immunoglobulin]]
[[Category: Structure]]
[[Category: Structure]]
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''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Fri May 2 23:07:38 2008''
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''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Wed Jul 2 10:55:12 2008''

Revision as of 07:55, 2 July 2008

Image:1ksr.png

Template:STRUCTURE 1ksr

THE REPEATING SEGMENTS OF THE F-ACTIN CROSS-LINKING GELATION FACTOR (ABP-120) HAVE AN IMMUNOGLOBULIN FOLD, NMR, 20 STRUCTURES

Template:ABSTRACT PUBMED 9164464

About this Structure

1KSR is a Single protein structure of sequence from Dictyostelium discoideum. Full experimental information is available from OCA.

Reference

The repeating segments of the F-actin cross-linking gelation factor (ABP-120) have an immunoglobulin-like fold., Fucini P, Renner C, Herberhold C, Noegel AA, Holak TA, Nat Struct Biol. 1997 Mar;4(3):223-30. PMID:9164464

Page seeded by OCA on Wed Jul 2 10:55:12 2008

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