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Structure and expression of a sugarcane gene encoding a housekeeping phosphoenolpyruvate carboxylase

✍ Scribed by Henrik A. Albert; Thomas Martin; Samuel S. M. Sun

Publisher: Springer
Year: 1992
Tongue: English
Weight: 731 KB
Volume: 20
Category: Article
ISSN: 0167-4412
DOI: 10.1007/bf00046451

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✦ Synopsis

A gene (SCPEPCD1) encoding phosphoenolpyruvate carboxylase (PEPC) was isolated from the C-4 monocot sugarcane (Saccharum hybrid var. H32-8560). SCPEPCD1 is ca. 6800 bp long, with 10 exons. The entire gene sequence from -1561 to 262 bp downstream of the putative poly(A) addition signal is reported. A low-level, essentially constitutive pattern of expression, amino acid sequence similarities to other 'housekeeping' PEPC enzymes, and the absence of DNA sequence elements conserved in the upstream region of maize and sorghum C-4-specific PEPC genes indicate that SCPEPCD1 encodes a housekeeping PEPC. Despite this, a motif proposed to act as a phosphorylation site in light-mediated activation of photosynthetic PEPC enzymes [10] is present in the SCPEPCD1 protein; evidence is presented for the presence of this site in other housekeeping PEPC proteins.

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