SUPT5H

SUPT5H has ubiquitous expression in testis (RPKM 64.5), bone marrow (RPKM 32.4) and 25 other tissues.

Full Name

suppressor of Ty 5 homolog (S. cerevisiae)

Function

Component of the DRB sensitivity-inducing factor complex (DSIF complex), which regulates mRNA processing and transcription elongation by RNA polymerase II. DSIF positively regulates mRNA capping by stimulating the mRNA guanylyltransferase activity of RNGTT/CAP1A. DSIF also acts cooperatively with the negative elongation factor complex (NELF complex) to enhance transcriptional pausing at sites proximal to the promoter. Transcriptional pausing may facilitate the assembly of an elongation competent RNA polymerase II complex. DSIF and NELF promote pausing by inhibition of the transcription elongation factor TFIIS/S-II. TFIIS/S-II binds to RNA polymerase II at transcription pause sites and stimulates the weak intrinsic nuclease activity of the enzyme. Cleavage of blocked transcripts by RNA polymerase II promotes the resumption of transcription from the new 3' terminus and may allow repeated attempts at transcription through natural pause sites. DSIF can also positively regulate transcriptional elongation and is required for the efficient activation of transcriptional elongation by the HIV-1 nuclear transcriptional activator, Tat. DSIF acts to suppress transcriptional pausing in transcripts derived from the HIV-1 LTR and blocks premature release of HIV-1 transcripts at terminator sequences.

Biological Process

Biological Process negative regulation of DNA-templated transcription, elongationManual Assertion Based On ExperimentIDA:UniProtKB
Biological Process negative regulation of transcription by RNA polymerase IIManual Assertion Based On ExperimentIDA:UniProtKB
Biological Process positive regulation of DNA-templated transcription, elongationManual Assertion Based On ExperimentIDA:UniProtKB
Biological Process positive regulation of macroautophagyManual Assertion Based On ExperimentIMP:BHF-UCL
Biological Process positive regulation of transcription by RNA polymerase IIManual Assertion Based On ExperimentIDA:UniProtKB
Biological Process regulation of DNA-templated transcriptionManual Assertion Based On ExperimentIDA:ComplexPortal
Biological Process regulation of transcription by RNA polymerase IIManual Assertion Based On ExperimentIBA:GO_Central
Biological Process transcription elongation by RNA polymerase II promoterManual Assertion Based On ExperimentIDA:UniProtKB

Cellular Location

Nucleus

PTM

Methylated by PRMT1/HRMT1L2 and PRMT5/SKB1. Methylation negatively regulates interaction with P-TEFb and RNA polymerase II.
Phosphorylated by CDK7 and CDK9. Phosphorylation by P-TEFb alleviates transcriptional pausing and can stimulate transcriptional elongation from the HIV-1 LTR. P-TEFb dependent phosphorylation is stimulated by the HIV-1 Tat protein. Phosphorylation may also stimulate interaction with PIN1. Bulk phosphorylation occurs predominantly in mitosis.