2g98
From Proteopedia
(New page: 200px<br /> <applet load="2g98" size="450" color="white" frame="true" align="right" spinBox="true" caption="2g98, resolution 2.20Å" /> '''human gamma-D-cryst...) |
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| - | [[Image:2g98.gif|left|200px]]<br /> | + | [[Image:2g98.gif|left|200px]]<br /><applet load="2g98" size="350" color="white" frame="true" align="right" spinBox="true" |
| - | <applet load="2g98" size=" | + | |
caption="2g98, resolution 2.20Å" /> | caption="2g98, resolution 2.20Å" /> | ||
'''human gamma-D-crystallin'''<br /> | '''human gamma-D-crystallin'''<br /> | ||
==Overview== | ==Overview== | ||
| - | We describe a 5-year-old boy with a unique congenital cataract caused by | + | We describe a 5-year-old boy with a unique congenital cataract caused by deposition of numerous birefringent, pleiochroic and macroscopically prismatic crystals. Crystal analysis with subsequent automatic Edman degradation and matrix-associated laser desorption ionization time-of-flight mass spectrometry have identified the crystal-forming protein as gammaD-crystallin (CRYGD) lacking the N-terminal methionine. Sequencing of the CRYGD gene has shown a heterozygous C-->A transversion in position 109 of the inferred cDNA (36R-->S transversion of the processed, N-terminal methionine-lacking CRYGD). The lens protein crystals were X-ray diffracting, and our crystal structure solution at 2.25 A suggests that mutant R36S CRYGD has an unaltered protein fold. In contrast, the observed crystal packing is possible only with the mutant protein molecules that lack the bulky Arg36 side chain. This is the first described case of human cataract caused by crystallization of a protein in the lens. It involves the third known mutation in the CRYGD gene but offers, for the first time, a causative explanation of the phenotype. |
==Disease== | ==Disease== | ||
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==About this Structure== | ==About this Structure== | ||
| - | 2G98 is a [http://en.wikipedia.org/wiki/Single_protein Single protein] structure of sequence from [http://en.wikipedia.org/wiki/Homo_sapiens Homo sapiens]. Full crystallographic information is available from [http:// | + | 2G98 is a [http://en.wikipedia.org/wiki/Single_protein 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=2G98 OCA]. |
==Reference== | ==Reference== | ||
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[[Category: crystalline]] | [[Category: crystalline]] | ||
| - | ''Page seeded by [http:// | + | ''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Thu Feb 21 17:29:24 2008'' |
Revision as of 15:29, 21 February 2008
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human gamma-D-crystallin
Contents |
Overview
We describe a 5-year-old boy with a unique congenital cataract caused by deposition of numerous birefringent, pleiochroic and macroscopically prismatic crystals. Crystal analysis with subsequent automatic Edman degradation and matrix-associated laser desorption ionization time-of-flight mass spectrometry have identified the crystal-forming protein as gammaD-crystallin (CRYGD) lacking the N-terminal methionine. Sequencing of the CRYGD gene has shown a heterozygous C-->A transversion in position 109 of the inferred cDNA (36R-->S transversion of the processed, N-terminal methionine-lacking CRYGD). The lens protein crystals were X-ray diffracting, and our crystal structure solution at 2.25 A suggests that mutant R36S CRYGD has an unaltered protein fold. In contrast, the observed crystal packing is possible only with the mutant protein molecules that lack the bulky Arg36 side chain. This is the first described case of human cataract caused by crystallization of a protein in the lens. It involves the third known mutation in the CRYGD gene but offers, for the first time, a causative explanation of the phenotype.
Disease
Known diseases associated with this structure: Cataract, congenital, cerulean type, 3 OMIM:[123690], Cataract, crystalline aculeiform OMIM:[123690], Cataract, nonnuclear polymorphic congenital OMIM:[123690], Cataracts, punctate, progressive juvenile-onset OMIM:[123690]
About this Structure
2G98 is a Single protein structure of sequence from Homo sapiens. Full crystallographic information is available from OCA.
Reference
Link between a novel human gammaD-crystallin allele and a unique cataract phenotype explained by protein crystallography., Kmoch S, Brynda J, Asfaw B, Bezouska K, Novak P, Rezacova P, Ondrova L, Filipec M, Sedlacek J, Elleder M, Hum Mol Genet. 2000 Jul 22;9(12):1779-86. PMID:10915766
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