1jq9

From Proteopedia

(Difference between revisions)

Revision as of 07:09, 23 October 2019

Crystal structure of a complex formed between phospholipase A2 from Daboia russelli pulchella and a designed pentapeptide Phe-Leu-Ser-Tyr-Lys at 1.8 resolution

Structural highlights

1jq9 is a 3 chain structure with sequence from Daboia russellii pulchella. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance.
Ligands:
Related:	1cl5, 1fb2, 1fe7, 1fv0, 1jq8
Activity:	Phospholipase A(2), with EC number 3.1.1.4
Resources:	FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT

Function

[PA2B8_DABRR] Snake venom phospholipase A2 (PLA2) that shows weak neurotoxicity and medium anticoagulant effects by binding to factor Xa (F10) and inhibiting the prothrombinase activity (IC(50) is 130 nM) (PubMed:18062812). It also damages vital organs such as lung, liver and kidney, displays edema-inducing activities when injected into the foot pads of mice and induces necrosis of muscle cells when injected into the thigh muscle. Has a low enzymatic activity. PLA2 catalyzes the calcium-dependent hydrolysis of the 2-acyl groups in 3-sn-phosphoglycerides.^[1] ^[2] ^[3]

Evolutionary Conservation

Check, as determined by ConSurfDB. You may read the explanation of the method and the full data available from ConSurf.

Publication Abstract from PubMed

Phospholipase A(2) is an important enzyme involved in the production of prostaglandins and their related compounds causing inflammatory disorders. Among the several peptides tested, the peptide Phe-Leu-Ser-Tyr-Lys (FLSYK) showed the highest inhibition. The dissociation constant (K(d)) for this peptide was calculated to be 3.57 +/- 0.05 x 10(-9) m. In order to further improve the degree of inhibition of phospholipase A(2), a complex between Russells viper snake venom phospholipase A(2) and a peptide inhibitor FLSYK was crystallized, and its structure was determined by crystallographic methods and refined to an R-factor of 0.205 at 1.8 A resolution. The structure contains two crystallographically independent molecules of phospholipase A(2) (molecules A and B) and a peptide molecule specifically bound to molecule A only. The two molecules formed an asymmetric dimer. The dimerization caused a modification in the binding site of molecule A. The overall conformations of molecules A and B were found to be generally similar except three regions i.e. the Trp-31-containing loop (residues 25-34), the beta-wing consisting of two antiparallel beta-strands (residues 74-85) and the C-terminal region (residues 119-133). Out of the above three, the most striking difference pertains to the conformation of Trp-31 in the two molecules. The orientation of Trp-31 in molecule A was suitable for the binding of FLSYK, while it disallowed the binding of peptide to molecule B. The structure of the complex clearly shows that the peptide is so placed in the binding site of molecule A that the side chain of its lysine residue interacted extensively with the enzyme and formed several hydrogen bonds in addition to a strong electrostatic interaction with critical Asp-49. The C-terminal carboxylic group of the peptide interacted with the catalytic residue His-48.

Crystal structure of a complex formed between a snake venom phospholipase A(2) and a potent peptide inhibitor Phe-Leu-Ser-Tyr-Lys at 1.8 A resolution.,Chandra V, Jasti J, Kaur P, Dey S, Perbandt M, Srinivasan A, Betzel Ch, Singh TP J Biol Chem. 2002 Oct 25;277(43):41079-85. Epub 2002 Aug 16. PMID:12186870^[4]

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.

References

↑ Faure G, Gowda VT, Maroun RC. Characterization of a human coagulation factor Xa-binding site on Viperidae snake venom phospholipases A2 by affinity binding studies and molecular bioinformatics. BMC Struct Biol. 2007 Dec 6;7:82. PMID:18062812 doi:http://dx.doi.org/10.1186/1472-6807-7-82
↑ Kasturi S, Rudrammaji LM, Gowda TV. Antibodies to a phospholipase A2 from Vipera russelli selectively neutralize venom neurotoxicity. Immunology. 1990 Jun;70(2):175-80. PMID:2115497
↑ Tsai IH, Lu PJ, Su JC. Two types of Russell's viper revealed by variation in phospholipases A2 from venom of the subspecies. Toxicon. 1996 Jan;34(1):99-109. PMID:8835338
↑ Chandra V, Jasti J, Kaur P, Dey S, Perbandt M, Srinivasan A, Betzel Ch, Singh TP. Crystal structure of a complex formed between a snake venom phospholipase A(2) and a potent peptide inhibitor Phe-Leu-Ser-Tyr-Lys at 1.8 A resolution. J Biol Chem. 2002 Oct 25;277(43):41079-85. Epub 2002 Aug 16. PMID:12186870 doi:10.1074/jbc.M206130200

1 Structural highlights
2 Function
3 Evolutionary Conservation
4 Publication Abstract from PubMed
5 See Also
6 References

Proteopedia Page Contributors and Editors (what is this?)

OCA

Retrieved from "http://52.214.119.220/wiki/index.php/1jq9"

@@ Line 1: / Line 1: @@
 ==Crystal structure of a complex formed between phospholipase A2 from Daboia russelli pulchella and a designed pentapeptide Phe-Leu-Ser-Tyr-Lys at 1.8 resolution==
-<StructureSection load='1jq9' size='340' side='right' caption='[[1jq9]], [[Resolution|resolution]] 1.80&Aring;' scene=''>
+<StructureSection load='1jq9' size='340' side='right'caption='[[1jq9]], [[Resolution|resolution]] 1.80&Aring;' scene=''>
 == Structural highlights ==
 <table><tr><td colspan='2'>[[1jq9]] is a 3 chain structure with sequence from [http://en.wikipedia.org/wiki/Daboia_russellii_pulchella Daboia russellii pulchella]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1JQ9 OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=1JQ9 FirstGlance]. <br>
@@ Line 30: / Line 30: @@
 </div>
 <div class="pdbe-citations 1jq9" style="background-color:#fffaf0;"></div>
+==See Also==
+*[[Phospholipase A2|Phospholipase A2]]
 == References ==
 <references/>
@@ Line 35: / Line 38: @@
 </StructureSection>
 [[Category: Daboia russellii pulchella]]
+[[Category: Large Structures]]
 [[Category: Betzel, C]]
 [[Category: Chandra, V]]

1jq9

From Proteopedia

Revision as of 07:09, 23 October 2019

Crystal structure of a complex formed between phospholipase A2 from Daboia russelli pulchella and a designed pentapeptide Phe-Leu-Ser-Tyr-Lys at 1.8 resolution

Structural highlights

Function

Evolutionary Conservation

Publication Abstract from PubMed

See Also

References

Contents

Proteopedia Page Contributors and Editors (what is this?)

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