Abstract:
:Truncated transcription factor-like proteins called microProteins (miPs) can modulate transcription factor activities, thereby increasing transcriptional regulatory complexity. To understand their prevalence, evolution, and function, we predicted over 400 genes that encode putative miPs from Arabidopsis (Arabidopsis thaliana) using a bioinformatics pipeline and validated two novel miPs involved in flowering time and response to abiotic and biotic stress. We provide an evolutionary perspective for a class of miPs targeting homeodomain transcription factors in plants and metazoans. We identify domain loss as one mechanism of miP evolution and suggest the possible roles of miPs on the evolution of their target transcription factors. Overall, we reveal a prominent layer of transcriptional regulation by miPs, show pervasiveness of such proteins both within and across genomes, and provide a framework for studying their function and evolution.
journal_name
Plant Physioljournal_title
Plant physiologyauthors
Magnani E,de Klein N,Nam HI,Kim JG,Pham K,Fiume E,Mudgett MB,Rhee SYdoi
10.1104/pp.114.235903subject
Has Abstractpub_date
2014-05-01 00:00:00pages
149-59issue
1eissn
0032-0889issn
1532-2548pii
pp.114.235903journal_volume
165pub_type
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