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1ilo
From Proteopedia
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|SITE= | |SITE= | ||
|LIGAND= | |LIGAND= | ||
| - | |ACTIVITY= [http://en.wikipedia.org/wiki/Phosphoadenylyl-sulfate_reductase_(thioredoxin) Phosphoadenylyl-sulfate reductase (thioredoxin)], with EC number [http://www.brenda-enzymes.info/php/result_flat.php4?ecno=1.8.4.8 1.8.4.8] | + | |ACTIVITY= <span class='plainlinks'>[http://en.wikipedia.org/wiki/Phosphoadenylyl-sulfate_reductase_(thioredoxin) Phosphoadenylyl-sulfate reductase (thioredoxin)], with EC number [http://www.brenda-enzymes.info/php/result_flat.php4?ecno=1.8.4.8 1.8.4.8] </span> |
|GENE= MtH895 ([http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=145262 Methanothermobacter thermautotrophicus]) | |GENE= MtH895 ([http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=145262 Methanothermobacter thermautotrophicus]) | ||
| + | |DOMAIN= | ||
| + | |RESOURCES=<span class='plainlinks'>[http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=1ilo FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1ilo OCA], [http://www.ebi.ac.uk/pdbsum/1ilo PDBsum], [http://www.fli-leibniz.de/cgi-bin/ImgLib.pl?CODE=1kfv JenaLib], [http://www.rcsb.org/pdb/explore.do?structureId=1ilo RCSB]</span> | ||
}} | }} | ||
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[[Category: structural genomic]] | [[Category: structural genomic]] | ||
| - | ''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on | + | ''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Wed Mar 26 05:53:41 2008'' |
Revision as of 03:53, 26 March 2008
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| Gene: | MtH895 (Methanothermobacter thermautotrophicus) | ||||||
| Activity: | Phosphoadenylyl-sulfate reductase (thioredoxin), with EC number 1.8.4.8 | ||||||
| Resources: | FirstGlance, OCA, PDBsum, JenaLib, RCSB | ||||||
| Coordinates: | save as pdb, mmCIF, xml | ||||||
NMR structure of a thioredoxin, MtH895, from the archeon Methanobacterium thermoautotrophicum strain delta H.
Overview
As part of a high-throughput, structural proteomic project we have used NMR spectroscopy to determine the solution structure and ascertain the function of a previously unknown, conserved protein (MtH895) from the thermophilic archeon Methanobacterium thermoautotrophicum. Our findings indicate that MtH895 contains a central four-stranded beta-sheet core surrounded by two helices on one side and a third on the other. It has an overall fold superficially similar to that of a glutaredoxin. However, detailed analysis of its three-dimensional structure along with molecular docking simulations of its interaction with T7 DNA polymerase (a thioredoxin-specific substrate) and comparisons with other known members of the thioredoxin/glutaredoxin family of proteins strongly suggest that MtH895 is more akin to a thioredoxin. Furthermore, measurement of the pK(a) values of its active site thiols along with direct measurements of the thioredoxin/glutaredoxin activity has confirmed that MtH895 is, indeed, a thioredoxin and exhibits no glutaredoxin activity. We have also identified a group of previously unknown proteins from several other archaebacteria that have significant (34-44%) sequence identity with MtH895. These proteins have unusual active site -CXXC- motifs not found in any known thioredoxin or glutaredoxin. On the basis of the results presented here, we predict that these small proteins are all members of a new class of truncated thioredoxins.
About this Structure
1ILO is a Single protein structure of sequence from Methanothermobacter thermautotrophicus. Full crystallographic information is available from OCA.
Reference
Identification of a novel archaebacterial thioredoxin: determination of function through structure., Bhattacharyya S, Habibi-Nazhad B, Amegbey G, Slupsky CM, Yee A, Arrowsmith C, Wishart DS, Biochemistry. 2002 Apr 16;41(15):4760-70. PMID:11939770
Page seeded by OCA on Wed Mar 26 05:53:41 2008
Categories: Methanothermobacter thermautotrophicus | Phosphoadenylyl-sulfate reductase (thioredoxin) | Single protein | Bhattacharyya, S. | Habibi-Nazhad, B. | NESG, Northeast Structural Genomics Consortium. | Slupsky, C M. | Sykes, B D. | Wishart, D S. | Beta-alpha-beta-alpha-beta-beta-alpha motif | Nesg | Northeast structural genomics consortium | Protein structure initiative | Psi | Structural genomic
