User:Daniel Seeman/Alpha-1-antitrypsin: Difference between revisions
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{{STRUCTURE_1atu | PDB=1atu1ezxwd.pdb | SCENE=User:Daniel_Seeman/Alpha-1-antitrypsin/437437437437/1}} | {{STRUCTURE_1atu | PDB=1atu1ezxwd.pdb | SCENE=User:Daniel_Seeman/Alpha-1-antitrypsin/437437437437/1}} | ||
'''Alpha-1-antitrypsin''' (or α1-antitrypsin, A1AT) is an inhibitor of [[Trypsin]]. It is a member of the '''Ser'''ine '''P'''rotease '''I'''nhibitor ([[:Category:Serpin|Serpin]]) family, and as such undergoes a conformational change where a loop region becomes ordered as a Beta Strand. In this case Trypsin is inhibited when a covalent bond is formed to A1AT. With A1AT, as with most members of the Serpin family, the transition from inactive precursor protein to active complex comes after a cleavage event. Shown <scene name='User:Daniel_Seeman/Alpha-1-antitrypsin/437437437437/1'>on the right</scene> is a morph, generated by the <span class="plainlinks">[http://molmovdb.mbb.yale.edu/molmovdb/morph/ Yale Morph Server]</span> that shows A1AT going from its inactive form, to the conformation in which it is bound to Trypsin (also shown in the same animation). | '''Alpha-1-antitrypsin''' (or α1-antitrypsin, A1AT) is an inhibitor of [[Elastase]] and [[Trypsin]]. It is a member of the '''Ser'''ine '''P'''rotease '''I'''nhibitor ([[:Category:Serpin|Serpin]]) family, and as such undergoes a conformational change where a loop region becomes ordered as a Beta Strand. In this case Trypsin is inhibited when a covalent bond is formed to A1AT. With A1AT, as with most members of the Serpin family, the transition from inactive precursor protein to active complex comes after a cleavage event. Shown <scene name='User:Daniel_Seeman/Alpha-1-antitrypsin/437437437437/1'>on the right</scene> is a morph, generated by the <span class="plainlinks">[http://molmovdb.mbb.yale.edu/molmovdb/morph/ Yale Morph Server]</span> that shows A1AT going from its inactive form, to the conformation in which it is bound to Trypsin (also shown in the same animation). | ||
=== Role in disease === | |||
Mutations of MET358 to ARG can lead to a change in specificity in the Elastase binding pocket, essentially turning the M358R mutant of A1AT into a Thrombin inhibitor by generating specificity for this new substrate. This drop in Thrombin levels can lead to hemorrhaging. | |||
=== Scenes === | === Scenes === | ||
Revision as of 01:16, 2 December 2008
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| 1atu, resolution 2.70Å () | |||||||||
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| Resources: | FirstGlance, OCA, RCSB, PDBsum | ||||||||
| Coordinates: | save as pdb, mmCIF, xml | ||||||||
Alpha-1-antitrypsin (or α1-antitrypsin, A1AT) is an inhibitor of Elastase and Trypsin. It is a member of the Serine Protease Inhibitor (Serpin) family, and as such undergoes a conformational change where a loop region becomes ordered as a Beta Strand. In this case Trypsin is inhibited when a covalent bond is formed to A1AT. With A1AT, as with most members of the Serpin family, the transition from inactive precursor protein to active complex comes after a cleavage event. Shown is a morph, generated by the Yale Morph Server that shows A1AT going from its inactive form, to the conformation in which it is bound to Trypsin (also shown in the same animation).
Role in diseaseRole in disease
Mutations of MET358 to ARG can lead to a change in specificity in the Elastase binding pocket, essentially turning the M358R mutant of A1AT into a Thrombin inhibitor by generating specificity for this new substrate. This drop in Thrombin levels can lead to hemorrhaging.