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2f4k

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Revision as of 14:05, 18 December 2019

Chicken villin subdomain HP-35, K65(NLE), N68H, K70(NLE), PH9

Structural highlights

2f4k is a 1 chain structure. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance.
NonStd Res:
Related:	1yrf, 1yri, 1wy4, 1wy3
Resources:	FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT

Function

[VILI_CHICK] Epithelial cell-specific Ca(2+)-regulated actin-modifying protein that modulates the reorganization of microvillar actin filaments. Plays a role in the actin nucleation, actin filament bundle assembly, actin filament capping and severing. Binds phosphatidylinositol 4,5-bisphosphate (PIP2) and lysophosphatidic acid (LPA); binds LPA with higher affinity than PIP2. Binding to LPA increases its phosphorylation by SRC and inhibits all actin-modifying activities. Binding to PIP2 inhibits actin-capping and -severing activities but enhances actin-bundling activity. Regulates the intestinal epithelial cell morphology, cell invasion, cell migration and apoptosis. Protects against apoptosis induced by dextran sodium sulfate (DSS) in the gastrointestinal epithelium. Appears to regulate cell death by maintaining mitochondrial integrity. Enhances hepatocyte growth factor (HGF)-induced epithelial cell motility, chemotaxis and wound repair (By similarity). Its actin-bundling activity is inhibited by tropomyosin.^[1] ^[2]

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

We have investigated the structure, equilibria, and folding kinetics of an engineered 35-residue subdomain of the chicken villin headpiece, an ultrafast-folding protein. Substitution of two buried lysine residues by norleucine residues stabilizes the protein by 1 kcal/mol and increases the folding rate sixfold, as measured by nanosecond laser T-jump. The folding rate at 300 K is (0.7 micros)(-1) with little or no temperature dependence, making this protein the first sub-microsecond folder, with a rate only twofold slower than the theoretically predicted speed limit. Using the 70 ns process to obtain the effective diffusion coefficient, the free energy barrier height is estimated from Kramers theory to be less than approximately 1 kcal/mol. X-ray crystallographic determination at 1A resolution shows no significant change in structure compared to the single-norleucine-substituted molecule and suggests that the increased stability is electrostatic in origin. The ultrafast folding rate, very accurate X-ray structure, and small size make this engineered villin subdomain an ideal system for simulation by atomistic molecular dynamics with explicit solvent.

Sub-microsecond protein folding.,Kubelka J, Chiu TK, Davies DR, Eaton WA, Hofrichter J J Mol Biol. 2006 Jun 9;359(3):546-53. Epub 2006 Mar 31. PMID:16643946^[3]

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.

References

↑ Burgess DR, Broschat KO, Hayden JM. Tropomyosin distinguishes between the two actin-binding sites of villin and affects actin-binding properties of other brush border proteins. J Cell Biol. 1987 Jan;104(1):29-40. PMID:3793760
↑ de Arruda MV, Bazari H, Wallek M, Matsudaira P. An actin footprint on villin. Single site substitutions in a cluster of basic residues inhibit the actin severing but not capping activity of villin. J Biol Chem. 1992 Jun 25;267(18):13079-85. PMID:1618806
↑ Kubelka J, Chiu TK, Davies DR, Eaton WA, Hofrichter J. Sub-microsecond protein folding. J Mol Biol. 2006 Jun 9;359(3):546-53. Epub 2006 Mar 31. PMID:16643946 doi:10.1016/j.jmb.2006.03.034

1 Structural highlights
2 Function
3 Evolutionary Conservation
4 Publication Abstract from PubMed
5 See Also
6 References

Proteopedia Page Contributors and Editors (what is this?)

OCA

Retrieved from "http://52.214.119.220/wiki/index.php/2f4k"

@@ Line 1: / Line 1: @@
 ==Chicken villin subdomain HP-35, K65(NLE), N68H, K70(NLE), PH9==
-<StructureSection load='2f4k' size='340' side='right' caption='[[2f4k]], [[Resolution|resolution]] 1.05&Aring;' scene=''>
+<StructureSection load='2f4k' size='340' side='right'caption='[[2f4k]], [[Resolution|resolution]] 1.05&Aring;' scene=''>
 == Structural highlights ==
 <table><tr><td colspan='2'>[[2f4k]] is a 1 chain structure. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=2F4K OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=2F4K FirstGlance]. <br>
@@ Line 36: / Line 36: @@
 __TOC__
 </StructureSection>
+[[Category: Large Structures]]
 [[Category: Chiu, T K]]
 [[Category: Davies, D R]]

2f4k

From Proteopedia

Revision as of 14:05, 18 December 2019

Chicken villin subdomain HP-35, K65(NLE), N68H, K70(NLE), PH9

Structural highlights

Function

Evolutionary Conservation

Publication Abstract from PubMed

See Also

References

Contents

Proteopedia Page Contributors and Editors (what is this?)

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