2ajc

From Proteopedia

(Difference between revisions)

Revision as of 08:58, 24 July 2019

Porcine dipeptidyl peptidase IV (CD26) in complex with 4-(2-Aminoethyl)-benzene sulphonyl fluoride (AEBSF)

Structural highlights

2ajc is a 4 chain structure with sequence from Pig. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance.
Ligands:	, , ,
Related:	1orv, 2aj8, 2ajb, 2ajd
Activity:	Dipeptidyl-peptidase IV, with EC number 3.4.14.5
Resources:	FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT

Function

[DPP4_PIG] Cell surface glycoprotein receptor involved in the costimulatory signal essential for T-cell receptor (TCR)-mediated T-cell activation. Acts as a positive regulator of T-cell coactivation, by binding at least ADA, CAV1, IGF2R, and PTPRC. Its binding to CAV1 and CARD11 induces T-cell proliferation and NF-kappa-B activation in a T-cell receptor/CD3-dependent manner. Its interaction with ADA also regulates lymphocyte-epithelial cell adhesion. In association with FAP is involved in the pericellular proteolysis of the extracellular matrix (ECM), the migration and invasion of endothelial cells into the ECM. May be involved in the promotion of lymphatic endothelial cells adhesion, migration and tube formation. When overexpressed, enhanced cell proliferation, a process inhibited by GPC3. Acts also as a serine exopeptidase with a dipeptidyl peptidase activity that regulates various physiological processes by cleaving peptides in the circulation, including many chemokines, mitogenic growth factors, neuropeptides and peptide hormones (By similarity). Removes N-terminal dipeptides sequentially from polypeptides having unsubstituted N-termini provided that the penultimate residue is proline.^[1]

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

Dipeptidyl peptidase IV (DPIV) is an alpha,beta-hydrolase-like serine exopeptidase, which removes dipeptides, preferentially with a C-terminal l-Pro residue, from the N terminus of longer peptide substrates. Previously, we determined the tetrameric 1.8A crystal structure of native porcine DPIV. Each monomer is composed of a beta-propeller and a catalytic domain, which together embrace an internal cavity housing the active centre. This cavity is connected to the bulk solvent by a "propeller opening" and a "side opening". Here, we analyse DPIV complexes with a t-butyl-Gly-Pro-Ile tripeptide, Pro-boroPro, a piperazine purine compound, and aminoethyl phenyl sulfonylfluoride. The latter two compounds bind to the active-site groove in a compact and a quite bulky manner, respectively, causing considerable shifts of the catalytic Ser630 side-chain and of the Tyr547 phenolic group, which forms the oxyanion hole. The tripeptide, mimicking a peptide substrate, is clamped to the active site through tight interactions via its N-terminal alpha-ammonium group, the P2 carbonyl group, the P1-l-Pro side-chain, the C-terminal carboxylate group, and the stable orthoacid ester amide formed between the scissile peptide carbonyl group and Ser630 O(gamma). This stable trapping of the tripeptide could be due to stabilization of the protonated His740 imidazolium cation by the adjacent negatively charged C-terminal carboxylate group, preventing proton transfer to the leaving group nitrogen atom. Docking experiments with the compact rigid 58 residue protein aprotinin, which had been shown to be processed by DPIV, indicate that the Arg1-Pro2 N terminus can access the DPIV active site only upon widening of its side openings, probably by separation of the first and the last propeller blades, and/or of the catalytic and the propeller domain.

Rigidity and flexibility of dipeptidyl peptidase IV: crystal structures of and docking experiments with DPIV.,Engel M, Hoffmann T, Manhart S, Heiser U, Chambre S, Huber R, Demuth HU, Bode W J Mol Biol. 2006 Jan 27;355(4):768-83. Epub 2005 Nov 22. PMID:16330047^[2]

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

References

↑ Bar J, Weber A, Hoffmann T, Stork J, Wermann M, Wagner L, Aust S, Gerhartz B, Demuth HU. Characterisation of human dipeptidyl peptidase IV expressed in Pichia pastoris. A structural and mechanistic comparison between the recombinant human and the purified porcine enzyme. Biol Chem. 2003 Dec;384(12):1553-63. PMID:14719797 doi:http://dx.doi.org/10.1515/BC.2003.172
↑ Engel M, Hoffmann T, Manhart S, Heiser U, Chambre S, Huber R, Demuth HU, Bode W. Rigidity and flexibility of dipeptidyl peptidase IV: crystal structures of and docking experiments with DPIV. J Mol Biol. 2006 Jan 27;355(4):768-83. Epub 2005 Nov 22. PMID:16330047 doi:10.1016/j.jmb.2005.11.014

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/2ajc"

@@ Line 1: / Line 1: @@
 ==Porcine dipeptidyl peptidase IV (CD26) in complex with 4-(2-Aminoethyl)-benzene sulphonyl fluoride (AEBSF)==
-<StructureSection load='2ajc' size='340' side='right' caption='[[2ajc]], [[Resolution|resolution]] 1.95&Aring;' scene=''>
+<StructureSection load='2ajc' size='340' side='right'caption='[[2ajc]], [[Resolution|resolution]] 1.95&Aring;' scene=''>
 == Structural highlights ==
 <table><tr><td colspan='2'>[[2ajc]] is a 4 chain structure with sequence from [http://en.wikipedia.org/wiki/Pig Pig]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=2AJC OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=2AJC FirstGlance]. <br>
@@ Line 15: / Line 15: @@
 Check<jmol>
   <jmolCheckbox>
-    <scriptWhenChecked>select protein; define ~consurf_to_do selected; consurf_initial_scene = true; script "/wiki/ConSurf/aj/2ajc_consurf.spt"</scriptWhenChecked>
+    <scriptWhenChecked>; select protein; define ~consurf_to_do selected; consurf_initial_scene = true; script "/wiki/ConSurf/aj/2ajc_consurf.spt"</scriptWhenChecked>
     <scriptWhenUnchecked>script /wiki/extensions/Proteopedia/spt/initialview01.spt</scriptWhenUnchecked>
     <text>to colour the structure by Evolutionary Conservation</text>
@@ Line 30: / Line 30: @@
 </div>
 <div class="pdbe-citations 2ajc" style="background-color:#fffaf0;"></div>
+==See Also==
+*[[Dipeptidyl peptidase 3D structures|Dipeptidyl peptidase 3D structures]]
 == References ==
 <references/>
@@ Line 35: / Line 38: @@
 </StructureSection>
 [[Category: Dipeptidyl-peptidase IV]]
+[[Category: Large Structures]]
 [[Category: Pig]]
 [[Category: Bode, W]]

2ajc

From Proteopedia

Revision as of 08:58, 24 July 2019

Porcine dipeptidyl peptidase IV (CD26) in complex with 4-(2-Aminoethyl)-benzene sulphonyl fluoride (AEBSF)

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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