1z3a

From Proteopedia

(Difference between revisions)

Revision as of 08:57, 20 January 2021

Crystal structure of tRNA adenosine deaminase TadA from Escherichia coli

Structural highlights

1z3a is a 2 chain structure with sequence from "bacillus_coli"_migula_1895 "bacillus coli" migula 1895. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance.
Ligands:
Gene:	tada ("Bacillus coli" Migula 1895)
Resources:	FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT, TOPSAN

Function

[TADA_ECOLI] Deaminates adenosine-34 to inosine in tRNA-Arg2. Mutation in this protein makes E.coli resistant to the toxic proteins encoded by the gef gene family. Essential for cell viability.^[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

The essential tRNA-specific adenosine deaminase catalyzes the deamination of adenosine to inosine at the wobble position of tRNAs. This modification allows for a single tRNA species to recognize multiple synonymous codons containing A, C, or U in the last (3'-most) position and ensures that all sense codons are appropriately decoded. We report the first combined structural and kinetic characterization of a wobble-specific deaminase. The structure of the Escherichia coli enzyme clearly defines the dimer interface and the coordination of the catalytically essential zinc ion. The structure also identifies the nucleophilic water and highlights residues near the catalytic zinc likely to be involved in recognition and catalysis of polymeric RNA substrates. A minimal 19 nucleotide RNA stem substrate has permitted the first steady-state kinetic characterization of this enzyme (k(cat) = 13 +/- 1 min(-)(1) and K(M) = 0.83 +/- 0.22 microM). A continuous coupled assay was developed to follow the reaction at high concentrations of polynucleotide substrates (>10 microM). This work begins to define the chemical and structural determinants responsible for catalysis and substrate recognition and lays the foundation for detailed mechanistic analysis of this essential enzyme.

Structural and kinetic characterization of Escherichia coli TadA, the wobble-specific tRNA deaminase.,Kim J, Malashkevich V, Roday S, Lisbin M, Schramm VL, Almo SC Biochemistry. 2006 May 23;45(20):6407-16. PMID:16700551^[2]

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

References

↑ Wolf J, Gerber AP, Keller W. tadA, an essential tRNA-specific adenosine deaminase from Escherichia coli. EMBO J. 2002 Jul 15;21(14):3841-51. PMID:12110595 doi:http://dx.doi.org/10.1093/emboj/cdf362
↑ Kim J, Malashkevich V, Roday S, Lisbin M, Schramm VL, Almo SC. Structural and kinetic characterization of Escherichia coli TadA, the wobble-specific tRNA deaminase. Biochemistry. 2006 May 23;45(20):6407-16. PMID:16700551 doi:10.1021/bi0522394

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/1z3a"

@@ Line 1: / Line 1: @@
 ==Crystal structure of tRNA adenosine deaminase TadA from Escherichia coli==
-<StructureSection load='1z3a' size='340' side='right' caption='[[1z3a]], [[Resolution|resolution]] 2.03&Aring;' scene=''>
+<StructureSection load='1z3a' size='340' side='right'caption='[[1z3a]], [[Resolution|resolution]] 2.03&Aring;' scene=''>
 == Structural highlights ==
-<table><tr><td colspan='2'>[[1z3a]] is a 2 chain structure with sequence from [http://en.wikipedia.org/wiki/"bacillus_coli"_migula_1895 "bacillus coli" migula 1895]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1Z3A OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=1Z3A FirstGlance]. <br>
+<table><tr><td colspan='2'>[[1z3a]] is a 2 chain structure with sequence from [http://en.wikipedia.org/wiki/"bacillus_coli"_migula_1895 "bacillus coli" migula 1895]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1Z3A OCA]. For a <b>guided tour on the structure components</b> use [http://proteopedia.org/fgij/fg.htm?mol=1Z3A FirstGlance]. <br>
-</td></tr><tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat"><scene name='pdbligand=ZN:ZINC+ION'>ZN</scene></td></tr>
+</td></tr><tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=ZN:ZINC+ION'>ZN</scene></td></tr>
 <tr id='gene'><td class="sblockLbl"><b>[[Gene|Gene:]]</b></td><td class="sblockDat">tada ([http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=562 "Bacillus coli" Migula 1895])</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=1z3a FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1z3a OCA], [http://pdbe.org/1z3a PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=1z3a RCSB], [http://www.ebi.ac.uk/pdbsum/1z3a PDBsum], [http://prosat.h-its.org/prosat/prosatexe?pdbcode=1z3a ProSAT], [http://www.topsan.org/Proteins/NYSGXRC/1z3a TOPSAN]</span></td></tr>
+<tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[http://proteopedia.org/fgij/fg.htm?mol=1z3a FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1z3a OCA], [http://pdbe.org/1z3a PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=1z3a RCSB], [http://www.ebi.ac.uk/pdbsum/1z3a PDBsum], [http://prosat.h-its.org/prosat/prosatexe?pdbcode=1z3a ProSAT], [http://www.topsan.org/Proteins/NYSGXRC/1z3a TOPSAN]</span></td></tr>
 </table>
 == Function ==
@@ Line 31: / Line 31: @@
 ==See Also==
-*[[Adenosine deaminase|Adenosine deaminase]]
+*[[Adenosine deaminase 3D structures|Adenosine deaminase 3D structures]]
 == References ==
 <references/>
@@ Line 37: / Line 37: @@
 </StructureSection>
 [[Category: Bacillus coli migula 1895]]
+[[Category: Large Structures]]
 [[Category: Almo, S C]]
 [[Category: Burley, S K]]

1z3a

From Proteopedia

Revision as of 08:57, 20 January 2021

Crystal structure of tRNA adenosine deaminase TadA from Escherichia coli

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