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* Residue conservation analysis
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Enzyme class:
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E.C.3.5.1.1
- Asparaginase.
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Reaction:
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L-asparagine + H2O = L-aspartate + NH3
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L-asparagine
Bound ligand (Het Group name = )
matches with 58.33% similarity
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+
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H(2)O
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=
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L-aspartate
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+
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NH(3)
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Molecule diagrams generated from .mol files obtained from the
KEGG ftp site
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Gene Ontology (GO) functional annotation
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Biological process
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cellular amino acid metabolic process
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2 terms
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Biochemical function
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hydrolase activity
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2 terms
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DOI no:
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Biochim Biophys Acta
1550:117-128
(2001)
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PubMed id:
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Do bacterial L-asparaginases utilize a catalytic triad Thr-Tyr-Glu?
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K.Aghaiypour,
A.Wlodawer,
J.Lubkowski.
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ABSTRACT
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The structures of Erwinia chrysanthemi L-asparaginase (ErA) complexed with the
L- and D-stereoisomers of the suicide inhibitor, 6-diazo-5-oxy-norleucine, have
been solved using X-ray crystallography and refined with data extending to 1.7
A. The distances between the Calpha atoms of the inhibitor molecules and the
hydroxyl oxygen atoms of Thr-15 and Tyr-29 (1.20 and 1.60 A, respectively)
clearly indicate the presence of covalent bonds between these moieties,
confirming the nucleophilic role of Thr-15 during the first stage of enzymatic
reactions and also indicating direct involvement of Tyr-29. The factors
responsible for activating Tyr-29 remain unclear, although some structural
changes around Ser-254', Asp-96, and Glu-63, common to both complexes, suggest
that those residues play a function. The role of Glu-289' as the activator of
Tyr-29, previously postulated for the closely related Pseudomonas 7A
L-glutaminase-asparaginase, is not confirmed in this study, due to the lack of
interactions between these residues in these complexes and in holoenzymes. The
results reported here are consistent with previous reports that mutants of
Escherichia coli L-asparaginase lacking Glu-289 remain catalytically active and
prove the catalytic roles of both Thr-15 and Tyr-29, while still leaving open
the question of the exact mechanism resulting in the unusual chemical properties
of these residues.
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Literature references that cite this PDB file's key reference
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PubMed id
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Reference
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S.Kumar,
V.Venkata Dasu,
and
K.Pakshirajan
(2011).
Purification and characterization of glutaminase-free L-asparaginase from Pectobacterium carotovorum MTCC 1428.
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Bioresour Technol, 102,
2077-2082.
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G.Brown,
A.Singer,
M.Proudfoot,
T.Skarina,
Y.Kim,
C.Chang,
I.Dementieva,
E.Kuznetsova,
C.F.Gonzalez,
A.Joachimiak,
A.Savchenko,
and
A.F.Yakunin
(2008).
Functional and structural characterization of four glutaminases from Escherichia coli and Bacillus subtilis.
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Biochemistry, 47,
5724-5735.
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PDB codes:
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O.V.Kravchenko,
Y.A.Kislitsin,
A.N.Popov,
S.V.Nikonov,
and
I.P.Kuranova
(2008).
Three-dimensional structures of L-asparaginase from Erwinia carotovora complexed with aspartate and glutamate.
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Acta Crystallogr D Biol Crystallogr, 64,
248-256.
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M.K.Yun,
A.Nourse,
S.W.White,
C.O.Rock,
and
R.J.Heath
(2007).
Crystal structure and allosteric regulation of the cytoplasmic Escherichia coli L-asparaginase I.
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J Mol Biol, 369,
794-811.
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PDB codes:
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N.Verma,
K.Kumar,
G.Kaur,
and
S.Anand
(2007).
L-asparaginase: a promising chemotherapeutic agent.
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Crit Rev Biotechnol, 27,
45-62.
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M.Yao,
Y.Yasutake,
H.Morita,
and
I.Tanaka
(2005).
Structure of the type I L-asparaginase from the hyperthermophilic archaeon Pyrococcus horikoshii at 2.16 angstroms resolution.
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Acta Crystallogr D Biol Crystallogr, 61,
294-301.
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PDB code:
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D.C.Dieterich,
M.Landwehr,
C.Reissner,
K.H.Smalla,
K.Richter,
G.Wolf,
T.M.Böckers,
E.D.Gundelfinger,
and
M.R.Kreutz
(2003).
Gliap--a novel untypical L-asparaginase localized to rat brain astrocytes.
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J Neurochem, 85,
1117-1125.
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J.Lubkowski,
M.Dauter,
K.Aghaiypour,
A.Wlodawer,
and
Z.Dauter
(2003).
Atomic resolution structure of Erwinia chrysanthemi L-asparaginase.
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Acta Crystallogr D Biol Crystallogr, 59,
84-92.
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PDB code:
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The most recent references are shown first.
Citation data come partly from CiteXplore and partly
from an automated harvesting procedure. Note that this is likely to be
only a partial list as not all journals are covered by
either method. However, we are continually building up the citation data
so more and more references will be included with time.
Where a reference describes a PDB structure, the PDB
codes are
shown on the right.
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