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  • KD/KO Validated

YAP1 Monoclonal antibody

YAP1 Monoclonal Antibody for IF, IHC, WB, ELISA

Host / Isotype

Mouse / IgG1


Human, mouse, rat and More (1)







Cat no : 66900-1-Ig


65 kDa Yes associated protein, YAP, YAP1, YAP2, YAP65, YKI, Yorkie homolog

Tested Applications

Positive WB detected inHeLa cells, HSC-T6 cells, NIH/3T3 cells, MCF-7 cells, HUVEC cells
Positive IHC detected inhuman lung cancer tissue, human colon cancer tissue, human liver cancer tissue, human ovary tumor tissue
Note: suggested antigen retrieval with TE buffer pH 9.0; (*) Alternatively, antigen retrieval may be performed with citrate buffer pH 6.0
Positive IF detected inHepG2 cells

Recommended dilution

Western Blot (WB)WB : 1:2000-1:8000
Immunohistochemistry (IHC)IHC : 1:1000-1:4000
Immunofluorescence (IF)IF : 1:200-1:800
Sample-dependent, check data in validation data gallery

Product Information

66900-1-Ig targets YAP1 in WB, IP, IHC, IF, ELISA applications and shows reactivity with Human, mouse, rat samples.

Tested Reactivity Human, mouse, rat
Cited Reactivityhuman, mouse, rat
Host / Isotype Mouse / IgG1
Class Monoclonal
Type Antibody
Immunogen YAP1 fusion protein Ag28194
Full Name Yes-associated protein 1, 65kDa
Calculated molecular weight 504 aa, 54 kDa
Observed molecular weight 70 kDa
GenBank accession numberBC038235
Gene symbol YAP1
Gene ID (NCBI) 10413
Conjugate Unconjugated
Form Liquid
Purification Method Protein G purification
Storage Buffer PBS with 0.02% sodium azide and 50% glycerol pH 7.3.
Storage ConditionsStore at -20°C. Stable for one year after shipment. Aliquoting is unnecessary for -20oC storage.

Background Information

Yes-associated protein 1 (YAP1) is a transcriptional regulator which can act both as a coactivator and a corepressor and is the critical downstream regulatory target in the Hippo signaling pathway that plays a pivotal role in organ size control and tumor suppression by restricting proliferation and promoting apoptosis. The core of this pathway is composed of a kinase cascade wherein STK3/MST2 and STK4/MST1, in complex with its regulatory protein SAV1, phosphorylates and activates LATS1/2 in complex with its regulatory protein MOB1, which in turn phosphorylates and inactivates YAP1 oncoprotein and WWTR1/TAZ. Plays a key role to control cell proliferation in response to cell contact. Phosphorylation of YAP1 by LATS1/2 inhibits its translocation into the nucleus to regulate cellular genes important for cell proliferation, cell death, and cell migration. The presence of TEAD transcription factors are required for it to stimulate gene expression, cell growth, anchorage-independent growth, and epithelial mesenchymal transition (EMT) induction. Isoform 2 and isoform 3 can activate the C-terminal fragment (CTF) of ERBB4 (isoform 3).Increased expression seen in some liver and prostate cancers. Isoforms lacking the transactivation domain found in striatal neurons of patients with Huntington disease (at protein level).It is actived by phosphorylation and degradated by ubiquitination (20048001).The calcualted molecular weight of YAP1is 54 kDa, but phosphorylated YAP1 is about 65-70 kDa. (PMID: 26695440)


Product Specific Protocols
WB protocol for YAP1 antibody 66900-1-IgDownload protocol
IHC protocol for YAP1 antibody 66900-1-IgDownload protocol
IF protocol for YAP1 antibody 66900-1-IgDownload protocol
Standard Protocols
Click here to view our Standard Protocols



Am J Transl Res

VASN promotes YAP/TAZ and EMT pathway in thyroid carcinogenesis in vitro.

Authors - Adheesh Bhandari

Cell Death Dis

CLDN6 promotes tumor progression through the YAP1-snail1 axis in gastric cancer.

Authors - Site Yu


Transforming growth factor-beta1 suppresses hepatocellular carcinoma proliferation via activation of Hippo signaling.

Authors - Xiaodong Zhang

J Exp Clin Cancer Res

Interplay between cancer cells and M2 macrophages is necessary for miR-550a-3-5p down-regulation-mediated HPV-positive OSCC progression.

Authors - Ming-Xin Cao

Cell Death Dis

CircATRNL1 promotes epithelial-mesenchymal transition in endometriosis by upregulating Yes-associated protein 1 in vitro.

Authors - Dandan Wang

Acta Pharmacol Sin

Critical role of PAFR/YAP1 positive feedback loop in cardiac fibrosis.

Authors - Tian-Yu Li
  • KD Validated


The reviews below have been submitted by verified Proteintech customers who received an incentive forproviding their feedback.


Joshua (Verified Customer) (01-29-2019)

Coverslips were fixed with 4%PFA+0.25% Triton-X-100. Primary staining was 1:500, secondary was 1:750 with rockland 488 anti-mouse overnight at 4C.Left panel: Control PANC1 cells.Right panel: PANC1 cells with YAP silencing

  • Applications: Immunofluorescence,
  • Primary Antibody Dilution: 1:500
  • Cell Tissue Type: PANC1
YAP1 Antibody Immunofluorescence, validation (1:500 dilution) in PANC1 (Cat no:66900-1-Ig)