1fb2: Difference between revisions
No edit summary |
No edit summary |
||
| Line 1: | Line 1: | ||
[[Image:1fb2.gif|left|200px]] | [[Image:1fb2.gif|left|200px]] | ||
<!-- | |||
The line below this paragraph, containing "STRUCTURE_1fb2", creates the "Structure Box" on the page. | |||
You may change the PDB parameter (which sets the PDB file loaded into the applet) | |||
| | or the SCENE parameter (which sets the initial scene displayed when the page is loaded), | ||
| | or leave the SCENE parameter empty for the default display. | ||
--> | |||
{{STRUCTURE_1fb2| PDB=1fb2 | SCENE= }} | |||
}} | |||
'''STRUCTURE OF PHOSPHOLIPASE A2 FROM DABOIA RUSSELLI PULCHELLA AT 1.95''' | '''STRUCTURE OF PHOSPHOLIPASE A2 FROM DABOIA RUSSELLI PULCHELLA AT 1.95''' | ||
| Line 29: | Line 26: | ||
[[Category: Kaur, P]] | [[Category: Kaur, P]] | ||
[[Category: Singh, T P.]] | [[Category: Singh, T P.]] | ||
[[Category: | [[Category: Daboia russelli pulchella]] | ||
[[Category: | [[Category: Neurotoxic]] | ||
[[Category: | [[Category: Phospholipase a2]] | ||
[[Category: | [[Category: Structure]] | ||
''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Fri May 2 16:07:17 2008'' | |||
''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on | |||
Revision as of 16:07, 2 May 2008
STRUCTURE OF PHOSPHOLIPASE A2 FROM DABOIA RUSSELLI PULCHELLA AT 1.95
OverviewOverview
The crystal structure of phospholipase A(2) from the venom of Daboia russelli pulchella has been refined to an R factor of 0.216 using 17,922 reflections to 1.9 A resolution. The structure contains two crystallographically independent molecules in the asymmetric unit. The overall conformations of the two molecules are essentially the same except for three regions, namely the calcium-binding loop including Trp31, the beta-wing and the C-terminal residues 119-131. Although these differences have apparently been caused by molecular packing, they seem to have functional relevance. Particularly noteworthy is the conformation of Trp31, which is favourable for substrate binding in one molecule as it is aligned with one of the side walls of the hydrophobic channel, whereas in the other molecule it is located at the mouth of the channel, thereby blocking the entry of substrates leading to loss of activity. This feature is unique to the present structure and does not occur in the dimers and trimers of other PLA(2)s.
About this StructureAbout this Structure
1FB2 is a Single protein structure of sequence from Daboia russellii pulchella. Full crystallographic information is available from OCA.
ReferenceReference
Regulation of catalytic function by molecular association: structure of phospholipase A2 from Daboia russelli pulchella (DPLA2) at 1.9 A resolution., Chandra V, Kaur P, Jasti J, Betzel C, Singh TP, Acta Crystallogr D Biol Crystallogr. 2001 Dec;57(Pt 12):1793-8. Epub 2001, Nov 21. PMID:11717491 Page seeded by OCA on Fri May 2 16:07:17 2008