2005
DOI: 10.1016/j.bbrc.2005.08.221
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Structure of catechol 1,2-dioxygenase from Pseudomonas arvilla

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Cited by 44 publications
(37 citation statements)
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“…Possibly, a Fe 3þ ion is located and functions around the interface of two subunits, as found for catechol 1,2-dioxygenase, a dimer containing 1 mol of Fe 3þ per mol of enzyme. 39) The DAD from Alcaligenes sp. 4HAP, whose specific activity is about half of the DAD purified from E. coli JM109 carrying pUDP1.3m, has been reported to be colorless and to consist of a homotetramer (M r ¼ 81:6{87 kDa) containing 1 mol of non-heme iron.…”
Section: Discussionmentioning
confidence: 99%
“…Possibly, a Fe 3þ ion is located and functions around the interface of two subunits, as found for catechol 1,2-dioxygenase, a dimer containing 1 mol of Fe 3þ per mol of enzyme. 39) The DAD from Alcaligenes sp. 4HAP, whose specific activity is about half of the DAD purified from E. coli JM109 carrying pUDP1.3m, has been reported to be colorless and to consist of a homotetramer (M r ¼ 81:6{87 kDa) containing 1 mol of non-heme iron.…”
Section: Discussionmentioning
confidence: 99%
“…[21,19] In particular, substitution in position 69 of leucine with alanine dramatically affects the K M for catechols with bulky substituents in position 4, by decreasing the K M for 4-methylcatechol by a factor of four, and for 4-chlorocatechol by a factor close to 20. The trend is confirmed in the double mutant, L69G-A72G in which the obtained values of K M for 4-methylcatechol and 4-chlorocatechol are consistent with an additive effect of the two mutations.…”
Section: Kinetics Substrate Specificity and Gain-of-functionmentioning
confidence: 98%
“…All the enzymes of the family are dimers and contain associated lipids whose role is still uncertain. [19][20][21] The recent characterisation of the crystal structure of two chlorocatechol dioxygenases [20,22] and the availability of the structures of catechol 1,2-dioxygenase from Acinetobacter calcoaceticus ADP1 (1,2-CTD) [21] and from Pseudomonas arvilla [19] allowed us to highlight and structurally align some key residues that define the active-site Catechol 1,2-dioxygenases and chlorocatechol dioxygenases are Fe III -dependent enzymes that do not require a reductant to perform the ortho cleavage of the aromatic ring. The reaction mechanism is common to the two enzymes, and active-site residues must play a key role in the fine-tuning of specificity.…”
Section: Introductionmentioning
confidence: 97%
“…[13][14][15][16][17] Neste sítio foi detectada uma densidade eletrônica compatível com a estrutura de um ácido graxo e não à de um fosfolipídio como relatado na literatura [13][14][15][16] . Além disso, trabalhos realizados anteriormente em nosso grupo de pesquisa mostraram que a possível delipidação da proteína, acarretaria uma perda da atividade específica, bem como levaria a uma menor afinidade da enzima pelo seu substrato 19 .…”
Section: Estudo Estrutural E Funcional Da Pp 12-ccd Quando Submetidaunclassified