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1o5t

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Revision as of 20:28, 25 December 2014

Crystal structure of the aminoacylation catalytic fragment of human tryptophanyl-tRNA synthetase

Structural highlights

1o5t is a 1 chain structure with sequence from Homo sapiens. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance.
Activity:	Tryptophan--tRNA ligase, with EC number 6.1.1.2
Resources:	FirstGlance, OCA, RCSB, PDBsum

Function

[SYWC_HUMAN] Isoform 1, isoform 2 and T1-TrpRS have aminoacylation activity while T2-TrpRS lacks it. Isoform 2, T1-TrpRS and T2-TrpRS possess angiostatic activity whereas isoform 1 lacks it. T2-TrpRS inhibits fluid shear stress-activated responses of endothelial cells. Regulates ERK, Akt, and eNOS activation pathways that are associated with angiogenesis, cytoskeletal reorganization and shear stress-responsive gene expression.^[1] ^[2] ^[3] ^[4]

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

Human tryptophanyl-tRNA synthetase (hTrpRS) produces a full-length and three N terminus-truncated forms through alternative splicing and proteolysis. The shortest fragment that contains the aminoacylation catalytic fragment (T2-hTrpRS) exhibits the most potent angiostatic activity. We report here the crystal structure of T2-hTrpRS at 2.5 A resolution, which was solved using the multi-wavelength anomalous diffraction method. T2-hTrpRS shares a very low sequence homology of 22% with Bacillus stearothermophilus TrpRS (bTrpRS); however, their overall structures are strikingly similar. Structural comparison of T2-hTrpRS with bTrpRS reveals substantial structural differences in the substrate-binding pocket and at the entrance to the pocket that play important roles in substrate binding and tRNA binding. T2-hTrpRS has a wide opening to the active site and adopts a compact conformation similar to the closed conformation of bTrpRS. These results suggest that mammalian and bacterial TrpRSs might use different mechanisms to recognize the substrate. Modeling studies indicate that tRNA binds with the dimeric enzyme and interacts primarily with the connective polypeptide 1 of hTrpRS via its acceptor arm and the alpha-helical domain of hTrpRS via its anticodon loop. Our results also suggest that the angiostatic activity is likely located at the alpha-helical domain, which resembles the short chain cytokines.

Crystal structure of human tryptophanyl-tRNA synthetase catalytic fragment: insights into substrate recognition, tRNA binding, and angiogenesis activity.,Yu Y, Liu Y, Shen N, Xu X, Xu F, Jia J, Jin Y, Arnold E, Ding J J Biol Chem. 2004 Feb 27;279(9):8378-88. Epub 2003 Dec 5. PMID:14660560^[5]

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

References

↑ Wakasugi K, Slike BM, Hood J, Otani A, Ewalt KL, Friedlander M, Cheresh DA, Schimmel P. A human aminoacyl-tRNA synthetase as a regulator of angiogenesis. Proc Natl Acad Sci U S A. 2002 Jan 8;99(1):173-7. Epub 2002 Jan 2. PMID:11773626 doi:10.1073/pnas.012602099
↑ Bange FC, Flohr T, Buwitt U, Bottger EC. An interferon-induced protein with release factor activity is a tryptophanyl-tRNA synthetase. FEBS Lett. 1992 Mar 30;300(2):162-6. PMID:1373391
↑ Otani A, Slike BM, Dorrell MI, Hood J, Kinder K, Ewalt KL, Cheresh D, Schimmel P, Friedlander M. A fragment of human TrpRS as a potent antagonist of ocular angiogenesis. Proc Natl Acad Sci U S A. 2002 Jan 8;99(1):178-83. Epub 2002 Jan 2. PMID:11773625 doi:10.1073/pnas.012601899
↑ Tzima E, Reader JS, Irani-Tehrani M, Ewalt KL, Schwartz MA, Schimmel P. Biologically active fragment of a human tRNA synthetase inhibits fluid shear stress-activated responses of endothelial cells. Proc Natl Acad Sci U S A. 2003 Dec 9;100(25):14903-7. Epub 2003 Nov 20. PMID:14630953 doi:10.1073/pnas.2436330100
↑ Yu Y, Liu Y, Shen N, Xu X, Xu F, Jia J, Jin Y, Arnold E, Ding J. Crystal structure of human tryptophanyl-tRNA synthetase catalytic fragment: insights into substrate recognition, tRNA binding, and angiogenesis activity. J Biol Chem. 2004 Feb 27;279(9):8378-88. Epub 2003 Dec 5. PMID:14660560 doi:10.1074/jbc.M311284200

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/1o5t"

@@ Line 3: / Line 3: @@
 == Structural highlights ==
 <table><tr><td colspan='2'>[[1o5t]] is a 1 chain structure with sequence from [http://en.wikipedia.org/wiki/Homo_sapiens Homo sapiens]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1O5T OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=1O5T FirstGlance]. <br>
-</td></tr><tr><td class="sblockLbl"><b>Activity:</b></td><td class="sblockDat"><span class='plainlinks'>[http://en.wikipedia.org/wiki/Tryptophan--tRNA_ligase Tryptophan--tRNA ligase], with EC number [http://www.brenda-enzymes.info/php/result_flat.php4?ecno=6.1.1.2 6.1.1.2] </span></td></tr>
+</td></tr><tr id='activity'><td class="sblockLbl"><b>Activity:</b></td><td class="sblockDat"><span class='plainlinks'>[http://en.wikipedia.org/wiki/Tryptophan--tRNA_ligase Tryptophan--tRNA ligase], with EC number [http://www.brenda-enzymes.info/php/result_flat.php4?ecno=6.1.1.2 6.1.1.2] </span></td></tr>
-<tr><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=1o5t FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1o5t OCA], [http://www.rcsb.org/pdb/explore.do?structureId=1o5t RCSB], [http://www.ebi.ac.uk/pdbsum/1o5t PDBsum]</span></td></tr>
+<tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=1o5t FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1o5t OCA], [http://www.rcsb.org/pdb/explore.do?structureId=1o5t RCSB], [http://www.ebi.ac.uk/pdbsum/1o5t PDBsum]</span></td></tr>
-<table>
+</table>
+== Function ==
+[[http://www.uniprot.org/uniprot/SYWC_HUMAN SYWC_HUMAN]] Isoform 1, isoform 2 and T1-TrpRS have aminoacylation activity while T2-TrpRS lacks it. Isoform 2, T1-TrpRS and T2-TrpRS possess angiostatic activity whereas isoform 1 lacks it. T2-TrpRS inhibits fluid shear stress-activated responses of endothelial cells. Regulates ERK, Akt, and eNOS activation pathways that are associated with angiogenesis, cytoskeletal reorganization and shear stress-responsive gene expression.<ref>PMID:11773626</ref> <ref>PMID:1373391</ref> <ref>PMID:11773625</ref> <ref>PMID:14630953</ref>
 == Evolutionary Conservation ==
 [[Image:Consurf_key_small.gif|200px|right]]
@@ Line 33: / Line 35: @@
 [[Category: Homo sapiens]]
 [[Category: Tryptophan--tRNA ligase]]
-[[Category: Arnold, E.]]
+[[Category: Arnold, E]]
-[[Category: Ding, J.]]
+[[Category: Ding, J]]
-[[Category: Jia, J.]]
+[[Category: Jia, J]]
-[[Category: Jin, Y.]]
+[[Category: Jin, Y]]
-[[Category: Liu, Y.]]
+[[Category: Liu, Y]]
-[[Category: Shen, N.]]
+[[Category: Shen, N]]
-[[Category: Xu, X.]]
+[[Category: Xu, X]]
-[[Category: Yu, Y.]]
+[[Category: Yu, Y]]
 [[Category: Four helix bundle]]
 [[Category: Ligase]]
 [[Category: Rossmann fold]]

1o5t

From Proteopedia

Revision as of 20:28, 25 December 2014

Crystal structure of the aminoacylation catalytic fragment of human tryptophanyl-tRNA synthetase

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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