Rabbit anti-Human PARP9 Polyclonal Antibody

Uniprot Id

Q8IXQ6

Target Species

Human

Target Name

PARP9

Target Full Name

Protein mono-ADP-ribosyltransferase PARP9

Target Function

ADP-ribosyltransferase which, in association with E3 ligase DTX3L, plays a role in DNA damage repair and in immune responses including interferon-mediated antiviral defenses. Within the complex, enhances DTX3L E3 ligase activity which is further enhanced by PARP9 binding to poly(ADP-ribose). In association with DTX3L and in presence of E1 and E2 enzymes, mediates NAD(+)-dependent mono-ADP-ribosylation of ubiquitin which prevents ubiquitin conjugation to substrates such as histones. During DNA repair, PARP1 recruits PARP9/BAL1-DTX3L complex to DNA damage sites via PARP9 binding to ribosylated PARP1. Subsequent PARP1-dependent PARP9/BAL1-DTX3L-mediated ubiquitination promotes the rapid and specific recruitment of 53BP1/TP53BP1, UIMC1/RAP80, and BRCA1 to DNA damage sites. In response to DNA damage, PARP9-DTX3L complex is required for efficient non-homologous end joining (NHEJ); the complex function is negatively modulated by PARP9 activity. Dispensable for B-cell receptor (BCR) assembly through V(D)J recombination and class switch recombination (CSR). In macrophages, positively regulates pro-inflammatory cytokines production in response to IFNG stimulation by suppressing PARP14-mediated STAT1 ADP-ribosylation and thus promoting STAT1 phosphorylation. Also suppresses PARP14-mediated STAT6 ADP-ribosylation.

Target Involvement

Overexpressed at significantly higher levels in fatal high-risk diffuse large B-cell lymphomas (DLB-CL) compared to cured low-risk tumors. Overexpression in B-cell lymphoma transfectants may promote malignant B-cell migration. May therefore be involved in promoting B-cell migration and dissemination of high-risk DLB-CL tumors (PubMed:11110709).

Target Subcellular Location

Cytoplasm, cytosol. Nucleus.

Target Tissue Specificity

Expressed in lymphocyte-rich tissues, spleen, lymph nodes, peripheral blood lymphocytes and colonic mucosa. Expressed in macrophages. Also expressed in nonhematopoietic tissues such as heart and skeletal muscle. Isoform 2 is the predominant form. Most abu

Target Research Area

Cancer

Target Synonyms

ADP-ribosyltransferase diphtheria toxin-like 9 B aggressive lymphoma protein Poly [ADP-ribose] polymerase 9