2jyw

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{{STRUCTURE_2jyw| PDB=2jyw | SCENE= }}
{{STRUCTURE_2jyw| PDB=2jyw | SCENE= }}
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'''Solution structure of C-terminal domain of APOBEC3G'''
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===Solution structure of C-terminal domain of APOBEC3G===
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==Overview==
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The human APOBEC3G (apolipoprotein B messenger-RNA-editing enzyme, catalytic polypeptide-like 3G) protein is a single-strand DNA deaminase that inhibits the replication of human immunodeficiency virus-1 (HIV-1), other retroviruses and retrotransposons. APOBEC3G anti-viral activity is circumvented by most retroelements, such as through degradation by HIV-1 Vif. APOBEC3G is a member of a family of polynucleotide cytosine deaminases, several of which also target distinct physiological substrates. For instance, APOBEC1 edits APOB mRNA and AID deaminates antibody gene DNA. Although structures of other family members exist, none of these proteins has elicited polynucleotide cytosine deaminase or anti-viral activity. Here we report a solution structure of the human APOBEC3G catalytic domain. Five alpha-helices, including two that form the zinc-coordinating active site, are arranged over a hydrophobic platform consisting of five beta-strands. NMR DNA titration experiments, computational modelling, phylogenetic conservation and Escherichia coli-based activity assays combine to suggest a DNA-binding model in which a brim of positively charged residues positions the target cytosine for catalysis. The structure of the APOBEC3G catalytic domain will help us to understand functions of other family members and interactions that occur with pathogenic proteins such as HIV-1 Vif.
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(as it appears on PubMed at http://www.pubmed.gov), where 18288108 is the PubMed ID number.
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{{ABSTRACT_PUBMED_18288108}}
==About this Structure==
==About this Structure==
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2JYW is a [[Single protein]] structure of sequence from [http://en.wikipedia.org/wiki/Homo_sapiens Homo sapiens]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=2JYW OCA].
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2JYW is a [[Single protein]] structure of sequence from [http://en.wikipedia.org/wiki/Homo_sapiens Homo sapiens]. Full experimental information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=2JYW OCA].
==Reference==
==Reference==
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[[Category: Ubl conjugation]]
[[Category: Ubl conjugation]]
[[Category: Zinc]]
[[Category: Zinc]]
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''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Sun May 4 09:25:04 2008''
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''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Mon Jul 28 01:40:51 2008''

Revision as of 22:40, 27 July 2008

Image:2jyw.png

Template:STRUCTURE 2jyw

Solution structure of C-terminal domain of APOBEC3G

Template:ABSTRACT PUBMED 18288108

About this Structure

2JYW is a Single protein structure of sequence from Homo sapiens. Full experimental information is available from OCA.

Reference

Structure of the DNA deaminase domain of the HIV-1 restriction factor APOBEC3G., Chen KM, Harjes E, Gross PJ, Fahmy A, Lu Y, Shindo K, Harris RS, Matsuo H, Nature. 2008 Mar 6;452(7183):116-9. Epub 2008 Feb 20. PMID:18288108

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