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| rdf:type
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| Description
| - Ornithine aminotransferase and 4-aminobutyrate aminotransferase are related pyridoxal phosphate-dependent enzymes having different substrate specificities. The atomic structures of these enzymes have shown (i) that active site differences are limited to the steric positions occupied by two tyrosine residues in ornithine aminotransferase and (ii) that, uniquely among related, structurally characterized aminotransferases, the conserved arginine that binds the alpha-carboxylate of alpha-amino acids interacts tightly with a glutamate residue. To determine the contribution of these residues to the specificities of the enzymes, we analyzed site-directed mutants of ornithine aminotransferase by rapid reaction kinetics, x-ray crystallography, and (13)C NMR spectroscopy. Mutation of one tyrosine (Tyr-85) to isoleucine, as found in aminobutyrate aminotransferase, decreased the rate of the reaction of the enzyme with ornithine 1000-fold and increased that with 4-aminobutyrate 16-fold, indicating that Tyr-85 is a
- Ornithine aminotransferase and 4-aminobutyrate aminotransferase are related pyridoxal phosphate-dependent enzymes having different substrate specificities. The atomic structures of these enzymes have shown (i) that active site differences are limited to the steric positions occupied by two tyrosine residues in ornithine aminotransferase and (ii) that, uniquely among related, structurally characterized aminotransferases, the conserved arginine that binds the alpha-carboxylate of alpha-amino acids interacts tightly with a glutamate residue. To determine the contribution of these residues to the specificities of the enzymes, we analyzed site-directed mutants of ornithine aminotransferase by rapid reaction kinetics, x-ray crystallography, and (13)C NMR spectroscopy. Mutation of one tyrosine (Tyr-85) to isoleucine, as found in aminobutyrate aminotransferase, decreased the rate of the reaction of the enzyme with ornithine 1000-fold and increased that with 4-aminobutyrate 16-fold, indicating that Tyr-85 is a (en)
- Podstata substrátové specifity omega-aminotransferas.Podstata substrátové specifity omega-aminotransferas.Podstata substrátové specifity omega-aminotransferas.Podstata substrátové specifity omega-aminotransferas.Podstata substrátové specifity omega-aminotransferas.Podstata substrátové specifity omega-aminotransferas.Podstata substrátové specifity omega-aminotransferas.Podstata substrátové specifity omega-aminotransferas.Podstata substrátové specifity omega-aminotransferas.Podstata substrátové specifity omega-aminotransferas. (cs)
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| Title
| - Determinants of Substrate Specificity in omega-Aminotransferases
- Determinants of Substrate Specificity in omega-Aminotransferases (en)
- Podstata substrátové specifity omega-aminotransferas. (cs)
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| skos:prefLabel
| - Determinants of Substrate Specificity in omega-Aminotransferases
- Determinants of Substrate Specificity in omega-Aminotransferases (en)
- Podstata substrátové specifity omega-aminotransferas. (cs)
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| skos:notation
| - RIV/60461373:22330/05:00016011!RIV06-GA0-22330___
|
| http://linked.open.../vavai/riv/strany
| |
| http://linked.open...avai/riv/aktivita
| |
| http://linked.open...avai/riv/aktivity
| - P(GA204/02/0843), Z(MSM 223300006)
|
| http://linked.open...iv/cisloPeriodika
| |
| http://linked.open...vai/riv/dodaniDat
| |
| http://linked.open...aciTvurceVysledku
| |
| http://linked.open.../riv/druhVysledku
| |
| http://linked.open...iv/duvernostUdaju
| |
| http://linked.open...titaPredkladatele
| |
| http://linked.open...dnocenehoVysledku
| |
| http://linked.open...ai/riv/idVysledku
| - RIV/60461373:22330/05:00016011
|
| http://linked.open...riv/jazykVysledku
| |
| http://linked.open.../riv/klicovaSlova
| |
| http://linked.open.../riv/klicoveSlovo
| |
| http://linked.open...odStatuVydavatele
| - US - Spojené státy americké
|
| http://linked.open...ontrolniKodProRIV
| |
| http://linked.open...i/riv/nazevZdroje
| - Journal of Biological Chemistry
|
| http://linked.open...in/vavai/riv/obor
| |
| http://linked.open...ichTvurcuVysledku
| |
| http://linked.open...cetTvurcuVysledku
| |
| http://linked.open...vavai/riv/projekt
| |
| http://linked.open...UplatneniVysledku
| |
| http://linked.open...v/svazekPeriodika
| |
| http://linked.open...iv/tvurceVysledku
| - Marková, Michaela
- Hewlins, Michael J. E.
- John, Robert A.
- Peneff, Caroline
- Schirmer, Tilman
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| http://linked.open...n/vavai/riv/zamer
| |
| issn
| |
| number of pages
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| http://localhost/t...ganizacniJednotka
| |
| is http://linked.open...avai/riv/vysledek
of | |
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