This old version of Proteopedia is provided for student assignments while the new version is undergoing repairs. Content and edits done in this old version of Proteopedia after March 1, 2026 will eventually be lost when it is retired in about June of 2026.

Apply for new accounts at the new Proteopedia. Your logins will work in both the old and new versions.


1h8d

From Proteopedia

(Difference between revisions)
Jump to: navigation, search
Line 1: Line 1:
-
[[Image:1h8d.gif|left|200px]]
+
{{Seed}}
 +
[[Image:1h8d.png|left|200px]]
<!--
<!--
Line 9: Line 10:
{{STRUCTURE_1h8d| PDB=1h8d | SCENE= }}
{{STRUCTURE_1h8d| PDB=1h8d | SCENE= }}
-
'''X-RAY STRUCTURE OF THE HUMAN ALPHA-THROMBIN COMPLEX WITH A TRIPEPTIDE PHOSPHONATE INHIBITOR.'''
+
===X-RAY STRUCTURE OF THE HUMAN ALPHA-THROMBIN COMPLEX WITH A TRIPEPTIDE PHOSPHONATE INHIBITOR.===
-
==Overview==
+
<!--
-
X-ray crystallographic studies of human alpha-thrombin with a novel synthetic inhibitor, an acyl (alpha-aminoalkyl)phosphonate, reveal the existence of a pentacovalent phosphorus intermediate state. Crystal structures of the complex of alpha-thrombin with the phosphonate compound were determined independently using crystals of different ages. The first structure, solved from a crystal less than seven days old, showed a pentacoordinated phosphorus moiety. The second structure, determined from a crystal that was 12 weeks old, showed a tetracoordinated phosphorus moiety. In the first structure, a water molecule, made nucleophilic by coordination to His57 of alpha-thrombin, is bonded to the pentacoordinated phosphorus atom. Its position is approximately equivalent to that occupied by the water molecule responsible for hydrolytic deacylation during normal hydrolysis. The pentacoordinated phosphorus adduct collapses to give the expected pseudo tetrahedral complex, where the phosphorus atom is covalently bonded to Ser195 O(gamma). The crystallographic data presented here therefore suggest that the covalent bond formed between the inhibitor's phosphorus atom and O(gamma) of Ser195 proceeds via an addition-elimination mechanism, which involves the formation of a pentacoordinate intermediate.
+
The line below this paragraph, {{ABSTRACT_PUBMED_11493008}}, adds the Publication Abstract to the page
 +
(as it appears on PubMed at http://www.pubmed.gov), where 11493008 is the PubMed ID number.
 +
-->
 +
{{ABSTRACT_PUBMED_11493008}}
==About this Structure==
==About this Structure==
Line 29: Line 33:
[[Category: Skordalakes, E.]]
[[Category: Skordalakes, E.]]
[[Category: Serine protease]]
[[Category: Serine protease]]
-
''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Fri May 2 18:33:58 2008''
+
 
 +
''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Tue Jul 1 06:47:56 2008''

Revision as of 03:47, 1 July 2008

Image:1h8d.png

Template:STRUCTURE 1h8d

X-RAY STRUCTURE OF THE HUMAN ALPHA-THROMBIN COMPLEX WITH A TRIPEPTIDE PHOSPHONATE INHIBITOR.

Template:ABSTRACT PUBMED 11493008

About this Structure

1H8D is a Protein complex structure of sequences from Hirudo medicinalis and Homo sapiens. Full crystallographic information is available from OCA.

Reference

Inhibition of human alpha-thrombin by a phosphonate tripeptide proceeds via a metastable pentacoordinated phosphorus intermediate., Skordalakes E, Dodson GG, Green DS, Goodwin CA, Scully MF, Hudson HR, Kakkar VV, Deadman JJ, J Mol Biol. 2001 Aug 17;311(3):549-55. PMID:11493008

Page seeded by OCA on Tue Jul 1 06:47:56 2008

Proteopedia Page Contributors and Editors (what is this?)

OCA

Retrieved from "http://52.214.119.220/wiki/index.php/1h8d"
Personal tools