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1ny7

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Revision as of 13:07, 17 July 2019

COWPEA MOSAIC VIRUS (CPMV)

Structural highlights

1ny7 is a 2 chain structure with sequence from Cpmv. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance.
Related:	1bmv
Resources:	FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT

Function

[POL2_CPMVS] Movement protein: transports viral genome to neighboring plant cells directly through plasmosdesmata, without any budding. The movement protein allows efficient cell to cell propagation, by bypassing the host cell wall barrier. Acts by forming a tubular structure at the host plasmodesmata, enlarging it enough to allow free passage of virion capsids. Binds to GTP and to single-stranded RNA and single-stranded DNA in a non-sequence-specific manner.^[1] ^[2] ^[3] ^[4] The cleavable C-terminus of small coat protein seems to be involved in the packaging of the virion RNAs. Also seems to act as suppressor of post-transcriptional gene silencing (PTGS), a mechanism of plant viral defense that limits the accumulation of viral RNAs.^[5] ^[6] ^[7] ^[8]

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

Comoviruses are a group of plant viruses in the picornavirus superfamily. The type member of comoviruses, cowpea mosaic virus (CPMV), was crystallized in the cubic space group I23, a = 317 A and the hexagonal space group P6(1)22, a = 451 A, c = 1038 A. Structures of three closely similar nucleoprotein particles were determined in the cubic form. The roughly 300-A capsid was similar to the picornavirus capsid displaying a pseudo T = 3 (P = 3) surface lattice. The three beta-sandwich domains adopt two orientations, one with the long axis radial and the other two with the long axes tangential in reference to the capsid sphere. T = 3 viruses display one or the other of these two orientations. The CPMV capsid was permeable to cesium ions, leading to a disturbance of the beta-annulus inside a channel-like structure, suggesting an ion channel. The hexagonal crystal form diffracted X rays to 3 A resolution, despite the large unit cell. The large ( approximately 200 A) solvent channels in the lattice allow exchange of CPMV cognate Fab fragments. As an initial step in the structure determination of the CPMV/Fab complex, the P6(1)22 crystal structure was solved by molecular replacement with the CPMV model determined in the cubic cell.

The refined crystal structure of cowpea mosaic virus at 2.8 A resolution.,Lin T, Chen Z, Usha R, Stauffacher CV, Dai JB, Schmidt T, Johnson JE Virology. 1999 Dec 5;265(1):20-34. PMID:10603314^[9]

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

References

↑ Taylor KM, Spall VE, Butler PJ, Lomonossoff GP. The cleavable carboxyl-terminus of the small coat protein of cowpea mosaic virus is involved in RNA encapsidation. Virology. 1999 Mar 1;255(1):129-37. PMID:10049828
↑ Canizares MC, Taylor KM, Lomonossoff GP. Surface-exposed C-terminal amino acids of the small coat protein of Cowpea mosaic virus are required for suppression of silencing. J Gen Virol. 2004 Nov;85(Pt 11):3431-5. PMID:15483261 doi:http://dx.doi.org/85/11/3431
↑ Liu L, Grainger J, Canizares MC, Angell SM, Lomonossoff GP. Cowpea mosaic virus RNA-1 acts as an amplicon whose effects can be counteracted by a RNA-2-encoded suppressor of silencing. Virology. 2004 May 20;323(1):37-48. PMID:15165817 doi:http://dx.doi.org/10.1016/j.virol.2004.02.013
↑ Carvalho CM, Pouwels J, van Lent JW, Bisseling T, Goldbach RW, Wellink J. The movement protein of cowpea mosaic virus binds GTP and single-stranded nucleic acid in vitro. J Virol. 2004 Feb;78(3):1591-4. PMID:14722313
↑ Taylor KM, Spall VE, Butler PJ, Lomonossoff GP. The cleavable carboxyl-terminus of the small coat protein of cowpea mosaic virus is involved in RNA encapsidation. Virology. 1999 Mar 1;255(1):129-37. PMID:10049828
↑ Canizares MC, Taylor KM, Lomonossoff GP. Surface-exposed C-terminal amino acids of the small coat protein of Cowpea mosaic virus are required for suppression of silencing. J Gen Virol. 2004 Nov;85(Pt 11):3431-5. PMID:15483261 doi:http://dx.doi.org/85/11/3431
↑ Liu L, Grainger J, Canizares MC, Angell SM, Lomonossoff GP. Cowpea mosaic virus RNA-1 acts as an amplicon whose effects can be counteracted by a RNA-2-encoded suppressor of silencing. Virology. 2004 May 20;323(1):37-48. PMID:15165817 doi:http://dx.doi.org/10.1016/j.virol.2004.02.013
↑ Carvalho CM, Pouwels J, van Lent JW, Bisseling T, Goldbach RW, Wellink J. The movement protein of cowpea mosaic virus binds GTP and single-stranded nucleic acid in vitro. J Virol. 2004 Feb;78(3):1591-4. PMID:14722313
↑ Lin T, Chen Z, Usha R, Stauffacher CV, Dai JB, Schmidt T, Johnson JE. The refined crystal structure of cowpea mosaic virus at 2.8 A resolution. Virology. 1999 Dec 5;265(1):20-34. PMID:10603314 doi:http://dx.doi.org/10.1006/viro.1999.0038

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/1ny7"

@@ Line 1: / Line 1: @@
 ==COWPEA MOSAIC VIRUS (CPMV)==
-<StructureSection load='1ny7' size='340' side='right' caption='[[1ny7]], [[Resolution|resolution]] 3.00&Aring;' scene=''>
+<StructureSection load='1ny7' size='340' side='right'caption='[[1ny7]], [[Resolution|resolution]] 3.00&Aring;' scene=''>
 == Structural highlights ==
 <table><tr><td colspan='2'>[[1ny7]] is a 2 chain structure with sequence from [http://en.wikipedia.org/wiki/Cpmv Cpmv]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1NY7 OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=1NY7 FirstGlance]. <br>
@@ Line 13: / Line 13: @@
 Check<jmol>
   <jmolCheckbox>
-    <scriptWhenChecked>select protein; define ~consurf_to_do selected; consurf_initial_scene = true; script "/wiki/ConSurf/ny/1ny7_consurf.spt"</scriptWhenChecked>
+    <scriptWhenChecked>; select protein; define ~consurf_to_do selected; consurf_initial_scene = true; script "/wiki/ConSurf/ny/1ny7_consurf.spt"</scriptWhenChecked>
     <scriptWhenUnchecked>script /wiki/extensions/Proteopedia/spt/initialview01.spt</scriptWhenUnchecked>
     <text>to colour the structure by Evolutionary Conservation</text>
@@ Line 31: / Line 31: @@
 ==See Also==
 *[[Cowpea Chlorotic Mottle Virus|Cowpea Chlorotic Mottle Virus]]
+*[[Virus coat protein|Virus coat protein]]
 == References ==
 <references/>
@@ Line 36: / Line 37: @@
 </StructureSection>
 [[Category: Cpmv]]
+[[Category: Large Structures]]
 [[Category: Chen, Z]]
 [[Category: Dai, J B]]

1ny7

From Proteopedia

Revision as of 13:07, 17 July 2019

COWPEA MOSAIC VIRUS (CPMV)

Structural highlights

Function

Evolutionary Conservation

Publication Abstract from PubMed

See Also

References

Contents

Proteopedia Page Contributors and Editors (what is this?)

Views

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