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evidence for a nuclear complex of Pat1b with the Lsm2 (Montrer LSM2 Protéines)-8 heptamer, which binds to the spliceosomal U6 small nuclear RNA (snRNA).
data indicate that P-body assembly occurs in a step-wise manner, where Rck (Montrer DDX6 Protéines) participates in the initial suppression of mRNA translation, whereas Pat1b in a second step triggers P-body assembly and promotes mRNA decapping
The PATL1 as well as DCP1A (Montrer DCP1A Protéines), a well-known P-body marker, co-localized with a subset of ALG-2 (Montrer PDCD6 Protéines).
Pat1b participates in several RNA-related nuclear processes in addition to its multiple regulatory roles in the cytoplasm
Pat1b represses gene expression by inducing deadenylation of the mRNAs.
hPat1b localizes to P-bodies, while mPat1a-GFP is either found weakly in P-bodies or disperses P-bodies in a dominant-negative fashion.
By tethering Pat1b to a reporter mRNA, the study provides evidence that Pat1b is also functionally linked to both deadenylation and decapping.
Data show that PatL1 is essential for the interaction with mRNA decapping factors (i.e. DCP2 (Montrer DCP2 Protéines), EDC4 (Montrer EDC4 Protéines) and LSm1 (Montrer LSM1 Protéines)-7), whereas the P-rich region and Mid domain have distinct functions in modulating these interactions.
The identification of two human PAT1 genes is described and one of them, PATL1, codes for an open reading frame with similar features as the yeast PAT1.
RNA-binding protein involved in deadenylation-dependent decapping of mRNAs, leading to the degradation of mRNAs. Acts as a scaffold protein that connects deadenylation and decapping machinery. Required for cytoplasmic mRNA processing body (P-body) assembly (By similarity).
protein associated with topoisomerase II homolog 1 (yeast)
, protein PAT1 homolog 1
, PAT1-like protein 1
, Protein PAT1 homolog 1
, Protein PAT1 homolog b
, protein PAT1 homolog b