RSF1

This gene encodes a nuclear protein that interacts with hepatitis B virus X protein (HBX) and facilitates transcription of hepatitis B virus genes by the HBX transcription activator, suggesting a role for this interaction in the virus life cycle. This protein also interacts with SNF2H protein to form the RSF chromatin-remodeling complex, where the SNF2H subunit functions as the nucleosome-dependent ATPase, and this protein as the histone chaperone. [provided by RefSeq, Sep 2011]

Full Name

Remodeling And Spacing Factor 1

Function

Regulatory subunit of the ATP-dependent RSF-1 and RSF-5 ISWI chromatin-remodeling complexes, which form ordered nucleosome arrays on chromatin and facilitate access to DNA during DNA-templated processes such as DNA replication, transcription, and repair (PubMed:12972596, PubMed:28801535).
Binds to core histones together with SMARCA5, and is required for the assembly of regular nucleosome arrays by the RSF-5 ISWI chromatin-remodeling complex (PubMed:12972596).
Directly stimulates the ATPase activity of SMARCA1 and SMARCA5 in the RSF-1 and RSF-5 ISWI chromatin-remodeling complexes, respectively (PubMed:28801535).
The RSF-1 ISWI chromatin remodeling complex has a lower ATP hydrolysis rate than the RSF-5 ISWI chromatin-remodeling complex (PubMed:28801535).
The complexes do not have the ability to slide mononucleosomes to the center of a DNA template (PubMed:28801535).
Facilitates transcription of hepatitis B virus (HBV) genes by the pX transcription activator. In case of infection by HBV, together with pX, it represses TNF-alpha induced NF-kappa-B transcription activation. Represses transcription when artificially recruited to chromatin by fusion to a heterogeneous DNA binding domain (PubMed:11944984, PubMed:11788598).

Biological Process

Biological Process chromatin assemblyManual Assertion Based On ExperimentIDA:ComplexPortal
Biological Process chromatin remodelingManual Assertion Based On ExperimentIDA:UniProtKB
Biological Process DNA-templated transcription initiationManual Assertion Based On ExperimentIDA:UniProtKB
Biological Process negative regulation of DNA bindingManual Assertion Based On ExperimentIDA:UniProtKB
Biological Process negative regulation of DNA-templated transcriptionManual Assertion Based On ExperimentIDA:UniProtKB
Biological Process nucleosome assemblyManual Assertion Based On ExperimentIDA:UniProtKB
Biological Process positive regulation of DNA-templated transcriptionManual Assertion Based On ExperimentIDA:UniProtKB
Biological Process positive regulation of transcription by RNA polymerase IIManual Assertion Based On ExperimentIBA:GO_Central
Biological Process positive regulation of viral transcriptionManual Assertion Based On ExperimentIDA:UniProtKB
Biological Process regulation of DNA-templated transcriptionManual Assertion Based On ExperimentIDA:ComplexPortal

Cellular Location

Nucleus
Localization is diffuse during mitosis (PubMed:12972596).
Co-localizes with SMARCA5 in the nucleus (PubMed:12972596).

PTM

Phosphorylated.