This old version of Proteopedia is provided for student assignments while the new version is undergoing repairs. Content and edits done in this old version of Proteopedia after March 1, 2026 will eventually be lost when it is retired in about June of 2026.

Apply for new accounts at the new Proteopedia. Your logins will work in both the old and new versions.

1gsi

From Proteopedia

(Difference between revisions)

Jump to: navigation, search

Current revision

CRYSTAL STRUCTURE OF MYCOBACTERIUM TUBERCULOSIS THYMIDYLATE KINASE COMPLEXED WITH THYMIDINE MONOPHOSPHATE (TMP)

Structural highlights

1gsi is a 1 chain structure with sequence from Mycobacterium tuberculosis. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance.
Method:	X-ray diffraction, Resolution 1.6Å
Ligands:	, , ,
Resources:	FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT

Function

KTHY_MYCTU Catalyzes the reversible phosphorylation of deoxythymidine monophosphate (dTMP) to deoxythymidine diphosphate (dTDP), using ATP as its preferred phosphoryl donor. Situated at the junction of both de novo and salvage pathways of deoxythymidine triphosphate (dTTP) synthesis, is essential for DNA synthesis and cellular growth. Has a broad specificity for nucleoside triphosphates, being highly active with ATP or dATP as phosphate donors, and less active with ITP, GTP, CTP and UTP.[HAMAP-Rule:MF_00165]

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

Caged compounds in combination with protein crystallography represent a valuable tool in studies of enzyme reaction intermediates. To date, photochemical triggering of reactions has been performed close to room temperature. Synchronous reaction initiation has only been achieved with enzymes of relatively slow turnover (<0.1 s(-1)) and caged compounds of high quantum yield. Here X-ray crystallography and microspectrophotometry were used to provide evidence that (nitrophenyl)ethyl (NPE) ester bonds can be photolyzed by UV light at cryotemperatures. NPE-caged ATP in flash-cooled crystals of Mycobacterium tuberculosis thymidylate kinase was photolyzed successfully at 100-150 K as assessed by the structural observation of ATP-dependent enzymatic conversion of TMP to TDP after temporarily warming the crystals to room temperature. A new method is proposed in which cryo-photolysis combined with temperature-controlled protein crystallography can be used to trap reaction intermediates even in some of the fastest enzymes and/or when only compounds of low quantum yield are available. Raising the temperature after cryophotolysis may allow a transition barrier to be passed and an intermediate to accumulate in the crystal. A comparable method has only been used so far with proteins displaying endogenous photosensitivity. The approach described here opens the way to studying the reaction mechanisms of a much larger number of crystalline enzymes. Furthermore, it is shown that X-ray-induced radiolysis of caged compounds occurs if high-intensity synchrotron beamlines are used. This caveat should be taken into account when deriving data-collection protocols. It could also be used potentially as a way to trigger reactions.

Cryophotolysis of caged compounds: a technique for trapping intermediate states in protein crystals.,Ursby T, Weik M, Fioravanti E, Delarue M, Goeldner M, Bourgeois D Acta Crystallogr D Biol Crystallogr. 2002 Apr;58(Pt 4):607-14. Epub 2002, Mar 22. PMID:11914484^[1]

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

References

↑ Ursby T, Weik M, Fioravanti E, Delarue M, Goeldner M, Bourgeois D. Cryophotolysis of caged compounds: a technique for trapping intermediate states in protein crystals. Acta Crystallogr D Biol Crystallogr. 2002 Apr;58(Pt 4):607-14. Epub 2002, Mar 22. PMID:11914484

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/1gsi"

@@ Line 3: / Line 3: @@
 <StructureSection load='1gsi' size='340' side='right'caption='[[1gsi]], [[Resolution|resolution]] 1.60&Aring;' scene=''>
 == Structural highlights ==
-<table><tr><td colspan='2'>[[1gsi]] is a 1 chain structure with sequence from [http://en.wikipedia.org/wiki/"bacillus_tuberculosis"_(zopf_1883)_klein_1884 "bacillus tuberculosis" (zopf 1883) klein 1884]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1GSI OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=1GSI FirstGlance]. <br>
+<table><tr><td colspan='2'>[[1gsi]] is a 1 chain structure with sequence from [https://en.wikipedia.org/wiki/Mycobacterium_tuberculosis Mycobacterium tuberculosis]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1GSI OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=1GSI FirstGlance]. <br>
-</td></tr><tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat"><scene name='pdbligand=ACT:ACETATE+ION'>ACT</scene>, <scene name='pdbligand=MG:MAGNESIUM+ION'>MG</scene>, <scene name='pdbligand=SO4:SULFATE+ION'>SO4</scene>, <scene name='pdbligand=TMP:THYMIDINE-5-PHOSPHATE'>TMP</scene></td></tr>
+</td></tr><tr id='method'><td class="sblockLbl"><b>[[Empirical_models|Method:]]</b></td><td class="sblockDat" id="methodDat">X-ray diffraction, [[Resolution|Resolution]] 1.6&#8491;</td></tr>
-<tr id='related'><td class="sblockLbl"><b>[[Related_structure|Related:]]</b></td><td class="sblockDat">[[1g3u|1g3u]]</td></tr>
+<tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=ACT:ACETATE+ION'>ACT</scene>, <scene name='pdbligand=MG:MAGNESIUM+ION'>MG</scene>, <scene name='pdbligand=SO4:SULFATE+ION'>SO4</scene>, <scene name='pdbligand=TMP:THYMIDINE-5-PHOSPHATE'>TMP</scene></td></tr>
-<tr id='activity'><td class="sblockLbl"><b>Activity:</b></td><td class="sblockDat"><span class='plainlinks'>[http://en.wikipedia.org/wiki/dTMP_kinase dTMP kinase], with EC number [http://www.brenda-enzymes.info/php/result_flat.php4?ecno=2.7.4.9 2.7.4.9] </span></td></tr>
+<tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[https://proteopedia.org/fgij/fg.htm?mol=1gsi FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1gsi OCA], [https://pdbe.org/1gsi PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=1gsi RCSB], [https://www.ebi.ac.uk/pdbsum/1gsi PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=1gsi ProSAT]</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=1gsi FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1gsi OCA], [http://pdbe.org/1gsi PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=1gsi RCSB], [http://www.ebi.ac.uk/pdbsum/1gsi PDBsum], [http://prosat.h-its.org/prosat/prosatexe?pdbcode=1gsi ProSAT]</span></td></tr>
 </table>
 == Function ==
-[[http://www.uniprot.org/uniprot/KTHY_MYCTU KTHY_MYCTU]] Catalyzes the reversible phosphorylation of deoxythymidine monophosphate (dTMP) to deoxythymidine diphosphate (dTDP), using ATP as its preferred phosphoryl donor. Situated at the junction of both de novo and salvage pathways of deoxythymidine triphosphate (dTTP) synthesis, is essential for DNA synthesis and cellular growth. Has a broad specificity for nucleoside triphosphates, being highly active with ATP or dATP as phosphate donors, and less active with ITP, GTP, CTP and UTP.[HAMAP-Rule:MF_00165]
+[https://www.uniprot.org/uniprot/KTHY_MYCTU KTHY_MYCTU] Catalyzes the reversible phosphorylation of deoxythymidine monophosphate (dTMP) to deoxythymidine diphosphate (dTDP), using ATP as its preferred phosphoryl donor. Situated at the junction of both de novo and salvage pathways of deoxythymidine triphosphate (dTTP) synthesis, is essential for DNA synthesis and cellular growth. Has a broad specificity for nucleoside triphosphates, being highly active with ATP or dATP as phosphate donors, and less active with ITP, GTP, CTP and UTP.[HAMAP-Rule:MF_00165]
 == Evolutionary Conservation ==
 [[Image:Consurf_key_small.gif|200px|right]]
@@ Line 32: / Line 31: @@
 ==See Also==
-*[[Thymidylate kinase|Thymidylate kinase]]
+*[[Thymidylate kinase 3D structures|Thymidylate kinase 3D structures]]
 == References ==
 <references/>
@@ Line 38: / Line 37: @@
 </StructureSection>
 [[Category: Large Structures]]
-[[Category: DTMP kinase]]
+[[Category: Mycobacterium tuberculosis]]
-[[Category: Bourgeois, D]]
+[[Category: Bourgeois D]]
-[[Category: Delarue, M]]
+[[Category: Delarue M]]
-[[Category: Fioravanti, E]]
+[[Category: Fioravanti E]]
-[[Category: Goeldner, M]]
+[[Category: Goeldner M]]
-[[Category: Ursby, T]]
+[[Category: Ursby T]]
-[[Category: Weik, M]]
+[[Category: Weik M]]
-[[Category: Kinase]]
-[[Category: Transferase]]

1gsi

From Proteopedia

Current revision

CRYSTAL STRUCTURE OF MYCOBACTERIUM TUBERCULOSIS THYMIDYLATE KINASE COMPLEXED WITH THYMIDINE MONOPHOSPHATE (TMP)

Structural highlights

Function

Evolutionary Conservation

Publication Abstract from PubMed

See Also

References

Contents

Proteopedia Page Contributors and Editors (what is this?)

Views

Personal tools

Navigation

Search

Toolbox