3b8k
From Proteopedia
| Line 1: | Line 1: | ||
| - | [[Image:3b8k.jpg|left|200px]] | + | [[Image:3b8k.jpg|left|200px]] |
| - | + | ||
| - | '''Structure of the Truncated Human Dihydrolipoyl Acetyltransferase (E2)''' | + | {{Structure |
| + | |PDB= 3b8k |SIZE=350|CAPTION= <scene name='initialview01'>3b8k</scene> | ||
| + | |SITE= | ||
| + | |LIGAND= | ||
| + | |ACTIVITY= [http://en.wikipedia.org/wiki/Dihydrolipoyllysine-residue_acetyltransferase Dihydrolipoyllysine-residue acetyltransferase], with EC number [http://www.brenda-enzymes.info/php/result_flat.php4?ecno=2.3.1.12 2.3.1.12] | ||
| + | |GENE= DLAT, DLTA ([http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=9606 Homo sapiens]) | ||
| + | }} | ||
| + | |||
| + | '''Structure of the Truncated Human Dihydrolipoyl Acetyltransferase (E2)''' | ||
| + | |||
==Overview== | ==Overview== | ||
| Line 7: | Line 16: | ||
==About this Structure== | ==About this Structure== | ||
| - | 3B8K is a [ | + | 3B8K is a [[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=3B8K OCA]. |
==Reference== | ==Reference== | ||
| - | Structures of the human pyruvate dehydrogenase complex cores: a highly conserved catalytic center with flexible N-terminal domains., Yu X, Hiromasa Y, Tsen H, Stoops JK, Roche TE, Zhou ZH, Structure. 2008 Jan;16(1):104-14. PMID:[http:// | + | Structures of the human pyruvate dehydrogenase complex cores: a highly conserved catalytic center with flexible N-terminal domains., Yu X, Hiromasa Y, Tsen H, Stoops JK, Roche TE, Zhou ZH, Structure. 2008 Jan;16(1):104-14. PMID:[http://www.ncbi.nlm.nih.gov/pubmed/18184588 18184588] |
[[Category: Dihydrolipoyllysine-residue acetyltransferase]] | [[Category: Dihydrolipoyllysine-residue acetyltransferase]] | ||
[[Category: Homo sapiens]] | [[Category: Homo sapiens]] | ||
| Line 20: | Line 29: | ||
[[Category: Yu, X.]] | [[Category: Yu, X.]] | ||
[[Category: Zhou, Z H.]] | [[Category: Zhou, Z H.]] | ||
| - | [[Category: central beta-sheet surrounded by five alpha- | + | [[Category: central beta-sheet surrounded by five alpha-helice]] |
[[Category: transferase]] | [[Category: transferase]] | ||
| - | ''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Thu | + | ''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Thu Mar 20 18:57:09 2008'' |
Revision as of 16:57, 20 March 2008
| |||||||
| Gene: | DLAT, DLTA (Homo sapiens) | ||||||
| Activity: | Dihydrolipoyllysine-residue acetyltransferase, with EC number 2.3.1.12 | ||||||
| Coordinates: | save as pdb, mmCIF, xml | ||||||
Structure of the Truncated Human Dihydrolipoyl Acetyltransferase (E2)
Overview
Dihydrolipoyl acetyltransferase (E2) is the central component of pyruvate dehydrogenase complex (PDC), which converts pyruvate to acetyl-CoA. Structural comparison by cryo-electron microscopy (cryo-EM) of the human full-length and truncated E2 (tE2) cores revealed flexible linkers emanating from the edges of trimers of the internal catalytic domains. Using the secondary structure constraints revealed in our 8 A cryo-EM reconstruction and the prokaryotic tE2 atomic structure as a template, we derived a pseudo atomic model of human tE2. The active sites are conserved between prokaryotic tE2 and human tE2. However, marked structural differences are apparent in the hairpin domain and in the N-terminal helix connected to the flexible linker. These permutations away from the catalytic center likely impart structures needed to integrate a second component into the inner core and provide a sturdy base for the linker that holds the pyruvate dehydrogenase for access by the E2-bound regulatory kinase/phosphatase components in humans.
About this Structure
3B8K is a Single protein structure of sequence from Homo sapiens. Full crystallographic information is available from OCA.
Reference
Structures of the human pyruvate dehydrogenase complex cores: a highly conserved catalytic center with flexible N-terminal domains., Yu X, Hiromasa Y, Tsen H, Stoops JK, Roche TE, Zhou ZH, Structure. 2008 Jan;16(1):104-14. PMID:18184588
Page seeded by OCA on Thu Mar 20 18:57:09 2008
