2k1x

NMR solution structure of M-crystallin in calcium free form (apo).NMR solution structure of M-crystallin in calcium free form (apo).

Structural highlights 2k1x is a 1 chain structure with sequence from Methanosarcina acetivorans. Full experimental information is available from OCA. For a guided tour on the structure components use FirstGlance. Method: Solution NMR Resources: FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT Function Q8TMX3_METAC 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 PubMed The lens betagamma-crystallin superfamily has many diverse but topologically related members belonging to various taxa. Based on structural topology, these proteins are considered as evolutionarily related to lens crystallins, suggesting their origin from a common ancestor. Proteins with betagamma-crystallin domains, although found in some eukaryotes and eubacteria, have not yet been reported in archaea. Sequence searches in the genome of the archaebacterium Methanosarcina acetivorans revealed the presence of a protein annotated as a betagamma-crystallin family protein, named M-crystallin. Solution structure of this protein indicates a typical betagamma-crystallin fold with a paired Greek-key motif. Among the known structures of betagamma-crystallin members, M-crystallin was found to be structurally similar to the vertebrate lens betagamma-crystallins. The Ca(2+)-binding properties of this primordial protein are somewhat more similar to those of vertebrate betagamma-crystallins than to those of bacterial homologues. These observations, taken together, suggest that amphibian and vertebrate betagamma-crystallin domains are evolutionarily more related to archaeal homologues than to bacterial homologues. Additionally, identification of a betagamma-crystallin homologue in archaea allows us to demonstrate the presence of this domain in all the three domains of life. Solution Structure and Calcium-Binding Properties of M-Crystallin, A Primordial betagamma-Crystallin from Archaea.,Barnwal RP, Jobby MK, Devi KM, Sharma Y, Chary KV J Mol Biol. 2008 Dec 31. PMID:19138688 From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine. See Also Crystallin 3D structures

spinqualitylabelsall models 2k1x Show:Asymmetric Unit Biological Assembly Drag the structure with the mouse to rotate   Export Animated Image