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1q7a

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Revision as of 09:55, 27 November 2019

Crystal structure of the complex formed between russell's viper phospholipase A2 and an antiinflammatory agent oxyphenbutazone at 1.6A resolution

Structural highlights

1q7a is a 1 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, 1oyf
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) (PLA(2); EC 3.1.1.4) is a key enzyme involved in the production of proinflammatory mediators known as eicosanoids. The binding of the substrate to PLA(2) occurs through a well-formed hydrophobic channel. To determine the viability of PLA(2) as a target molecule for the structure-based drug design against inflammation, arthritis, and rheumatism, the crystal structure of the complex of PLA(2) with a known anti-inflammatory compound oxyphenbutazone (OPB), which has been determined at 1.6 A resolution. The structure has been refined to an R factor of 0.209. The structure contains 1 molecule each of PLA(2) and OPB with 2 sulfate ions and 111 water molecules. The binding studies using surface plasmon resonance show that OPB binds to PLA(2) with a dissociation constant of 6.4 x 10(-8) M. The structure determination has revealed the presence of an OPB molecule at the binding site of PLA(2). It fits well in the binding region, thus displaying a high level of complementarity. The structure also indicates that OPB works as a competitive inhibitor. A large number of hydrophobic interactions between the enzyme and the OPB molecule have been observed. The hydrophobic interactions involving residues Tyr(52) and Lys(69) with OPB are particularly noteworthy. Other residues of the hydrophobic channel such as Leu(3), Phe(5), Met(8), Ile(9), and Ala(18) are also interacting extensively with the inhibitor. The crystal structure clearly reveals that the binding of OPB to PLA(2) is specific in nature and possibly suggests that the basis of its anti-inflammatory effects may be due to its binding to PLA(2) as well.

Phospholipase A2 as a target protein for nonsteroidal anti-inflammatory drugs (NSAIDS): crystal structure of the complex formed between phospholipase A2 and oxyphenbutazone at 1.6 A resolution.,Singh N, Jabeen T, Somvanshi RK, Sharma S, Dey S, Singh TP Biochemistry. 2004 Nov 23;43(46):14577-83. PMID:15544328^[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
↑ Singh N, Jabeen T, Somvanshi RK, Sharma S, Dey S, Singh TP. Phospholipase A2 as a target protein for nonsteroidal anti-inflammatory drugs (NSAIDS): crystal structure of the complex formed between phospholipase A2 and oxyphenbutazone at 1.6 A resolution. Biochemistry. 2004 Nov 23;43(46):14577-83. PMID:15544328 doi:10.1021/bi0483561

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/1q7a"

@@ Line 1: / Line 1: @@
 ==Crystal structure of the complex formed between russell's viper phospholipase A2 and an antiinflammatory agent oxyphenbutazone at 1.6A resolution==
-<StructureSection load='1q7a' size='340' side='right' caption='[[1q7a]], [[Resolution|resolution]] 1.60&Aring;' scene=''>
+<StructureSection load='1q7a' size='340' side='right'caption='[[1q7a]], [[Resolution|resolution]] 1.60&Aring;' scene=''>
 == Structural highlights ==
 <table><tr><td colspan='2'>[[1q7a]] is a 1 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=1Q7A OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=1Q7A FirstGlance]. <br>
@@ Line 30: / Line 30: @@
 </div>
 <div class="pdbe-citations 1q7a" style="background-color:#fffaf0;"></div>
+==See Also==
+*[[Phospholipase A2 3D structures|Phospholipase A2 3D structures]]
 == References ==
 <references/>
@@ Line 35: / Line 38: @@
 </StructureSection>
 [[Category: Daboia russellii pulchella]]
+[[Category: Large Structures]]
 [[Category: Jabeen, T]]
 [[Category: Sharma, S]]

1q7a

From Proteopedia

Revision as of 09:55, 27 November 2019

Crystal structure of the complex formed between russell's viper phospholipase A2 and an antiinflammatory agent oxyphenbutazone at 1.6A resolution

Structural highlights

Function

Evolutionary Conservation

Publication Abstract from PubMed

See Also

References

Contents

Proteopedia Page Contributors and Editors (what is this?)

Views

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