Abstract：
:1-aminocyclopropane-1-carboxylic acid oxidase (ACO) enzyme is a member of the Fe II-dependent family of oxidases/oxygenases which require Fe(2+) as a cofactor, ascorbate as a cosubstrate and CO(2) as an activator. This enzyme catalyses the terminal step in the plant signaling of ethylene biosynthetic pathway. A 948 bp fragment of the ACO1 gene cDNA sequence was cloned from tomato (Lycopersicon esculentum) fruit tissues by using reverse transcriptase-polymerase chain reaction (RT-PCR) with two PCR primers designed according to the sequence of a tomato cDNA clone (X58273). The BLAST search showed a high level of similarity (77-98 %) between ACO1 and ACO genes of other plants. The calculated molecular mass and predicted isoelectric point of LeACO1 were 35.8 kDa and 5.13, respectively. The three-dimensional structure studies illustrated that the LeACO1 protein folds into a compact jelly-roll motif comprised of 8 α-helices, 12 β-strands and several long loops. The cosubstrate was located in a cofactor-binding pocket referred to as a 2-His-1-carboxylate facial triad. Semi-quantitative RT-PCR analysis of gene expression revealed that the LeACO1 was expressed in fruit tissues at different ripening stages.
journal_name
Mol Biol Repjournal_title
Molecular biology reportsauthors
Jafari Z,Haddad R,Hosseini R,Garoosi Gdoi
10.1007/s11033-012-2178-7subject
Has Abstractpub_date
2013-02-01 00:00:00pages
1341-50issue
2eissn
0301-4851issn
1573-4978journal_volume
40pub_type
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