2hlc: Difference between revisions

Revision as of 18:43, 21 February 2008

HL COLLAGENASE STRUCTURE AT 1.7A RESOLUTION

OverviewOverview

Collagenase from the fly larvae Hypoderma lineatum cleaves triple-helical collagen in a single region. It was crystallized at neutral pH in the absence of inhibitor and 1.8 A data were collected using synchrotron radiation and a Mark II prototype detector. The structure was solved by combining multiple isomorphous replacement methods and rotation translation function in real space. Refinement between 7 and 1.8 A using the program X-PLOR led to a final R factor of 16.9%. The overall fold is similar to that of other trypsin-like enzymes but the structure differs mainly by the presence of a beta-sheet at position 31-44. The two embedded molecules of the asymmetric unit are related by a pseudo twofold axis. The beta-sheet 31-44 of one molecule is involved in hydrogen bonds with binding-pocket residues of the other molecule. It thus completely prevents access to the active site. The specificity of this enzyme probably results from the position of Phe192 and Tyr99 at the entrance of the active site.

About this StructureAbout this Structure

2HLC is a Single protein structure of sequence from Hypoderma lineatum. Full crystallographic information is available from OCA.

ReferenceReference

1.8 A structure of Hypoderma lineatum collagenase: a member of the serine proteinase family., Broutin I, Arnoux B, Riche C, Lecroisey A, Keil B, Pascard C, Ducruix A, Acta Crystallogr D Biol Crystallogr. 1996 Mar 1;52(Pt 2):380-92. PMID:15299709

Page seeded by OCA on Thu Feb 21 17:43:04 2008

Proteopedia Page Contributors and Editors (what is this?)Proteopedia Page Contributors and Editors (what is this?)

OCA

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-[[Image:2hlc.gif|left|200px]]<br /><applet load="2hlc" size="450" color="white" frame="true" align="right" spinBox="true"
+[[Image:2hlc.gif|left|200px]]<br /><applet load="2hlc" size="350" color="white" frame="true" align="right" spinBox="true"
 caption="2hlc, resolution 1.7&Aring;" />
 '''HL COLLAGENASE STRUCTURE AT 1.7A RESOLUTION'''<br />
 ==Overview==
-Collagenase from the fly larvae Hypoderma lineatum cleaves triple-helical, collagen in a single region. It was crystallized at neutral pH in the, absence of inhibitor and 1.8 A data were collected using synchrotron, radiation and a Mark II prototype detector. The structure was solved by, combining multiple isomorphous replacement methods and rotation, translation function in real space. Refinement between 7 and 1.8 A using, the program X-PLOR led to a final R factor of 16.9%. The overall fold is, similar to that of other trypsin-like enzymes but the structure differs, mainly by the presence of a beta-sheet at position 31-44. The two embedded, molecules of the asymmetric unit are related by a pseudo twofold axis. The, beta-sheet 31-44 of one molecule is involved in hydrogen bonds with, binding-pocket residues of the other molecule. It thus completely prevents, access to the active site. The specificity of this enzyme probably results, from the position of Phe192 and Tyr99 at the entrance of the active site.
+Collagenase from the fly larvae Hypoderma lineatum cleaves triple-helical collagen in a single region. It was crystallized at neutral pH in the absence of inhibitor and 1.8 A data were collected using synchrotron radiation and a Mark II prototype detector. The structure was solved by combining multiple isomorphous replacement methods and rotation translation function in real space. Refinement between 7 and 1.8 A using the program X-PLOR led to a final R factor of 16.9%. The overall fold is similar to that of other trypsin-like enzymes but the structure differs mainly by the presence of a beta-sheet at position 31-44. The two embedded molecules of the asymmetric unit are related by a pseudo twofold axis. The beta-sheet 31-44 of one molecule is involved in hydrogen bonds with binding-pocket residues of the other molecule. It thus completely prevents access to the active site. The specificity of this enzyme probably results from the position of Phe192 and Tyr99 at the entrance of the active site.
 ==About this Structure==
-HLC is a [http://en.wikipedia.org/wiki/Single_protein Single protein] structure of sequence from [http://en.wikipedia.org/wiki/Hypoderma_lineatum Hypoderma lineatum]. Full crystallographic information is available from [http://ispc.weizmann.ac.il/oca-bin/ocashort?id=2HLC OCA].
+HLC is a [http://en.wikipedia.org/wiki/Single_protein Single protein] structure of sequence from [http://en.wikipedia.org/wiki/Hypoderma_lineatum Hypoderma lineatum]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=2HLC OCA].
 ==Reference==
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 [[Category: serine protease]]
-''Page seeded by [http://ispc.weizmann.ac.il/oca OCA ] on Wed Nov 21 11:50:05 2007''
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