These tools will no longer be maintained as of December 31, 2024. Archived website can be found here. PubMed4Hh GitHub repository can be found here. Contact NLM Customer Service if you have questions.


Pubmed for Handhelds

PUBMED FOR HANDHELDS

Search MEDLINE/PubMed

  • Title: Molecular cloning and characterization of the chicken cationic amino acid transporter-2 gene.
    Author: Humphrey BD, Kirsch S, Morris D.
    Journal: Comp Biochem Physiol B Biochem Mol Biol; 2008 Jul; 150(3):301-11. PubMed ID: 18495509.
    Abstract:
    The system y(+) cationic amino acid transporters (CATs) play an important role in the regulation of lysine and arginine utilization. We have characterized the genomic organization and tissue transcription of the chicken CAT-2 (cCAT-2) isoforms from pectoralis muscle. The primary cCAT-2 transcript is alternatively spliced within the same position of the mRNA to produce cCAT-2A and cCAT-2B isoforms that share high nucleotide homology with their mammalian counterparts. We also identified a novel third CAT-2 isoform, cCAT-2C. This isoform contains a premature termination codon and studies in the chicken LMH cell line show that cCAT-2C mRNA is degraded by the nonsense-mediated mRNA decay pathway. All three cCAT-2 isoforms are transcribed in liver, pectoralis, gastrocnemius and heart. Chicken cCAT-2A was the predominant cCAT-2 isoform in liver, pectoralis and gastrocnemius. Analysis of the 5'-untranslated region of cCAT-2 identified multiple cCAT-2 promoters. Chicken CAT-2 promoter usage was tissue dependent and was not responsible for cCAT-2 isoform production. Analysis of genomic sequence upstream cCAT-2 promoter regions revealed binding sites for transcription factors involved in amino acid sensing, hormone signaling and immune function. These results provide insight into the role of the cCAT-2 gene and its regulation of lysine and arginine utilization in aves.
    [Abstract] [Full Text] [Related] [New Search]