1jyd
From Proteopedia
(New page: 200px<br /> <applet load="1jyd" size="450" color="white" frame="true" align="right" spinBox="true" caption="1jyd, resolution 1.70Å" /> '''Crystal Structure o...) |
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| - | [[Image:1jyd.gif|left|200px]]<br /> | + | [[Image:1jyd.gif|left|200px]]<br /><applet load="1jyd" size="350" color="white" frame="true" align="right" spinBox="true" |
| - | <applet load="1jyd" size=" | + | |
caption="1jyd, resolution 1.70Å" /> | caption="1jyd, resolution 1.70Å" /> | ||
'''Crystal Structure of Recombinant Human Serum Retinol-Binding Protein at 1.7 A Resolution'''<br /> | '''Crystal Structure of Recombinant Human Serum Retinol-Binding Protein at 1.7 A Resolution'''<br /> | ||
==Overview== | ==Overview== | ||
| - | Serum retinol binding protein (RBP) is a member of the lipocalin family, proteins with up-and-down beta-barrel folds, low levels of sequence | + | Serum retinol binding protein (RBP) is a member of the lipocalin family, proteins with up-and-down beta-barrel folds, low levels of sequence identity, and diverse functions. Although tryptophan 24 of RBP is highly conserved among lipocalins, it does not play a direct role in activity. To determine if Trp24 and other conserved residues have roles in stability and/or folding, we investigated the effects of conservative substitutions for the four tryptophans and some adjacent residues on the structure, stability, and spectroscopic properties of apo-RBP. Crystal structures of recombinant human apo-RBP and of a mutant with substitutions for tryptophans 67 and 91 at 1.7 A and 2.0 A resolution, respectively, as well as stability measurements, indicate that these relatively exposed tryptophans have little influence on structure or stability. Although Trp105 is largely buried in the wall of the beta-barrel, it can be replaced with minor effects on stability to thermal and chemical unfolding. In contrast, substitutions of three different amino acids for Trp24 or replacement of Arg139, a conserved residue that interacts with Trp24, lead to similar large losses in stability and lower yields of native protein generated by in vitro folding. The results and the coordinated nature of natural substitutions at these sites support the idea that conserved residues in functionally divergent homologs have roles in stabilizing the native relative to misfolded structures. They also establish conditions for studies of the kinetics of folding and unfolding by identifying spectroscopic signals for monitoring the formation of different substructures. |
==Disease== | ==Disease== | ||
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==About this Structure== | ==About this Structure== | ||
| - | 1JYD is a [http://en.wikipedia.org/wiki/Single_protein Single protein] structure of sequence from [http://en.wikipedia.org/wiki/Homo_sapiens Homo sapiens] with GOL as [http://en.wikipedia.org/wiki/ligand ligand]. Full crystallographic information is available from [http:// | + | 1JYD is a [http://en.wikipedia.org/wiki/Single_protein Single protein] structure of sequence from [http://en.wikipedia.org/wiki/Homo_sapiens Homo sapiens] with <scene name='pdbligand=GOL:'>GOL</scene> as [http://en.wikipedia.org/wiki/ligand ligand]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1JYD OCA]. |
==Reference== | ==Reference== | ||
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[[Category: Homo sapiens]] | [[Category: Homo sapiens]] | ||
[[Category: Single protein]] | [[Category: Single protein]] | ||
| - | [[Category: Acharya, K | + | [[Category: Acharya, K R.]] |
[[Category: Brew, K.]] | [[Category: Brew, K.]] | ||
| - | [[Category: Chrysina, E | + | [[Category: Chrysina, E D.]] |
| - | [[Category: Greene, L | + | [[Category: Greene, L H.]] |
| - | [[Category: Irons, L | + | [[Category: Irons, L I.]] |
| - | [[Category: Papageorgiou, A | + | [[Category: Papageorgiou, A C.]] |
[[Category: GOL]] | [[Category: GOL]] | ||
[[Category: beta barrel]] | [[Category: beta barrel]] | ||
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[[Category: retinol binding protein]] | [[Category: retinol binding protein]] | ||
| - | ''Page seeded by [http:// | + | ''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Thu Feb 21 13:28:04 2008'' |
Revision as of 11:28, 21 February 2008
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Crystal Structure of Recombinant Human Serum Retinol-Binding Protein at 1.7 A Resolution
Contents |
Overview
Serum retinol binding protein (RBP) is a member of the lipocalin family, proteins with up-and-down beta-barrel folds, low levels of sequence identity, and diverse functions. Although tryptophan 24 of RBP is highly conserved among lipocalins, it does not play a direct role in activity. To determine if Trp24 and other conserved residues have roles in stability and/or folding, we investigated the effects of conservative substitutions for the four tryptophans and some adjacent residues on the structure, stability, and spectroscopic properties of apo-RBP. Crystal structures of recombinant human apo-RBP and of a mutant with substitutions for tryptophans 67 and 91 at 1.7 A and 2.0 A resolution, respectively, as well as stability measurements, indicate that these relatively exposed tryptophans have little influence on structure or stability. Although Trp105 is largely buried in the wall of the beta-barrel, it can be replaced with minor effects on stability to thermal and chemical unfolding. In contrast, substitutions of three different amino acids for Trp24 or replacement of Arg139, a conserved residue that interacts with Trp24, lead to similar large losses in stability and lower yields of native protein generated by in vitro folding. The results and the coordinated nature of natural substitutions at these sites support the idea that conserved residues in functionally divergent homologs have roles in stabilizing the native relative to misfolded structures. They also establish conditions for studies of the kinetics of folding and unfolding by identifying spectroscopic signals for monitoring the formation of different substructures.
Disease
Known disease associated with this structure: Retinol binding protein, deficiency of OMIM:[180250]
About this Structure
1JYD is a Single protein structure of sequence from Homo sapiens with as ligand. Full crystallographic information is available from OCA.
Reference
Role of conserved residues in structure and stability: tryptophans of human serum retinol-binding protein, a model for the lipocalin superfamily., Greene LH, Chrysina ED, Irons LI, Papageorgiou AC, Acharya KR, Brew K, Protein Sci. 2001 Nov;10(11):2301-16. PMID:11604536
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