1brg: Difference between revisions
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==CRYSTALLOGRAPHIC ANALYSIS OF PHE->LEU SUBSTITUTION IN THE HYDROPHOBIC CORE OF BARNASE== | ==CRYSTALLOGRAPHIC ANALYSIS OF PHE->LEU SUBSTITUTION IN THE HYDROPHOBIC CORE OF BARNASE== | ||
<StructureSection load='1brg' size='340' side='right' caption='[[1brg]], [[Resolution|resolution]] 2.20Å' scene=''> | <StructureSection load='1brg' size='340' side='right'caption='[[1brg]], [[Resolution|resolution]] 2.20Å' scene=''> | ||
== Structural highlights == | == Structural highlights == | ||
<table><tr><td colspan='2'>[[1brg]] is a 3 chain structure with sequence from [http://en.wikipedia.org/wiki/"bacillus_amyloliquifaciens"_(sic)_fukumoto_1943 "bacillus amyloliquifaciens" (sic) fukumoto 1943]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1BRG OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=1BRG FirstGlance]. <br> | <table><tr><td colspan='2'>[[1brg]] is a 3 chain structure with sequence from [http://en.wikipedia.org/wiki/"bacillus_amyloliquifaciens"_(sic)_fukumoto_1943 "bacillus amyloliquifaciens" (sic) fukumoto 1943]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1BRG OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=1BRG FirstGlance]. <br> | ||
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Check<jmol> | Check<jmol> | ||
<jmolCheckbox> | <jmolCheckbox> | ||
<scriptWhenChecked>select protein; define ~consurf_to_do selected; consurf_initial_scene = true; script "/wiki/ConSurf/br/1brg_consurf.spt"</scriptWhenChecked> | <scriptWhenChecked>; select protein; define ~consurf_to_do selected; consurf_initial_scene = true; script "/wiki/ConSurf/br/1brg_consurf.spt"</scriptWhenChecked> | ||
<scriptWhenUnchecked>script /wiki/extensions/Proteopedia/spt/initialview01.spt</scriptWhenUnchecked> | <scriptWhenUnchecked>script /wiki/extensions/Proteopedia/spt/initialview01.spt</scriptWhenUnchecked> | ||
<text>to colour the structure by Evolutionary Conservation</text> | <text>to colour the structure by Evolutionary Conservation</text> | ||
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==See Also== | ==See Also== | ||
*[[Barnase 3D structures|Barnase 3D structures]] | |||
*[[Ribonuclease|Ribonuclease]] | |||
*[[Temp|Temp]] | *[[Temp|Temp]] | ||
== References == | == References == | ||
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__TOC__ | __TOC__ | ||
</StructureSection> | </StructureSection> | ||
[[Category: Large Structures]] | |||
[[Category: Chen, Y W]] | [[Category: Chen, Y W]] | ||
[[Category: Fersht, A R]] | [[Category: Fersht, A R]] | ||
[[Category: Henrick, K]] | [[Category: Henrick, K]] | ||
[[Category: Endonuclease]] | [[Category: Endonuclease]] | ||
Revision as of 13:54, 17 July 2019
CRYSTALLOGRAPHIC ANALYSIS OF PHE->LEU SUBSTITUTION IN THE HYDROPHOBIC CORE OF BARNASECRYSTALLOGRAPHIC ANALYSIS OF PHE->LEU SUBSTITUTION IN THE HYDROPHOBIC CORE OF BARNASE
Structural highlights
Function[RNBR_BACAM] Hydrolyzes phosphodiester bonds in RNA, poly- and oligoribonucleotides resulting in 3'-nucleoside monophosphates via 2',3'-cyclophosphate intermediates. 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 PubMedThe crystal structure of a barnase mutant, Phe-->Leu7 has been determined to 2.2 A resolution. No structural rearrangement is observed near the mutated residue. The F7L mutation is highly destabilizing and this is caused by the loss of extensive van der Waals contacts that wild-type Phe7 made with its neighbouring residues, and the exposure of a large hydrophobic pocket on the surface of the protein. The side-chain conformations of the mutated Leu7 residue have torsion angles chi(1) ranging from -138 degrees to -168 degrees and chi(2) ranging from +16 degrees to +70 degrees, for the three molecules in the asymmetric unit. These angles do not agree with the most frequently observed conformations in the protein side-chain rotamer library [Ponder & Richards (1987). J. Mol. Biol. 193, 775-791]. However, when compared to a more recent 'backbone-dependent' rotamer library [Dunbrack & Karplus (1993). J. Mol. Biol. 230, 543-574], the side-chain conformation of Leu7 agrees well with that of the most frequently observed rotamers. The side-chain conformation of Leu7 was found to be dictated by two factors: it has the lowest conformational energy and it buries the most hydrophobic surface area. Crystallographic analysis of Phe-->Leu substitution in the hydrophobic core of barnase.,Chen YW, Fersht AR, Henrick K Acta Crystallogr D Biol Crystallogr. 1995 Mar 1;51(Pt 2):220-31. PMID:15299323[1] From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine. See AlsoReferences
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