XB-ART-8874
Biochim Biophys Acta
2001 May 28;15191-2:117-21. doi: 10.1016/s0167-4781(01)00207-x.
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Molecular cloning of mouse allantoicase cDNA.
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The uric acid degradation pathway is progressively lost during vertebrate evolution. In mammals, the end product of this catabolic pathway is allantoin and, therefore, no allantoicase should be present in mouse tissues. Surprisingly, we have found an expressed sequence tag (EST) from mouse testis with high similarity to allantoicase. To characterize this transcript, we have completely sequenced the corresponding EST clone insert and found a 1495 bp long cDNA coding for a 414 amino acid long protein. Identities of mouse versus microorganism allantoicases range from 25 to 30%. Identity reaches 54% when compared to Xenopus allantoicase. Among the tested tissues, only testis possesses the allantoicase transcript. Although no deleterious mutations were found in the coding region, no allantoicase activity could be detected in mouse testis.
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