Rubisco large-subunit translation is autoregulated in response to its assembly state in tobacco chloroplasts.

ABSTRACT: Plants rely on ribulose bisphosphate carboxylase/oxygenase (Rubisco) for carbon fixation. Higher plant Rubisco possesses an L(8)S(8) structure, with the large subunit (LS) encoded in the chloroplast by rbcL and the small subunit encoded by the nuclear RBCS gene family. Because its components accumulate stoichiometrically but are encoded in two genetic compartments, rbcL and RBCS expression must be tightly coordinated. Although this coordination has been observed, the underlying mechanisms have not been defined. Here, we use tobacco to understand how LS translation is related to its assembly status. To do so, two transgenic lines deficient in LS biogenesis were created: a chloroplast transformant expressing a truncated and unstable LS polypeptide, and a line where a homolog of the maize Rub

SUBMITTER: Wostrikoff K 

PROVIDER: S-EPMC1851044 | biostudies-literature | 2007 Apr

REPOSITORIES: biostudies-literature