Revision 3

#49316Store at -20C

Cell Signaling Technology

Orders: 877-616-CELL (2355) [email protected]

Support: 877-678-TECH (8324)

Web: [email protected] cellsignal.com

3 Trask LaneDanversMassachusetts01923USA
For Research Use Only. Not for Use in Diagnostic Procedures.
Applications:

WB, IP, IHC-P

REACTIVITY:

H

SENSITIVITY:

Endogenous

MW (kDa):

30

Source/Isotype:

Rabbit IgG

UniProt ID:

#Q8IXP5

Entrez-Gene Id:

341032

Product Information

Product Usage Information

Application Dilution
Western Blotting 1:1000
Immunoprecipitation 1:100
Immunohistochemistry (Paraffin) 1:500 - 1:2000

Storage

Supplied in 10 mM sodium HEPES (pH 7.5), 150 mM NaCl, 100 µg/mL BSA, 50% glycerol, and less than 0.02% sodium azide. Store at –20°C. Do not aliquot the antibody.

For a carrier free (BSA and azide free) version of this product see product #78954.

Specificity / Sensitivity

OCA-T1 (E4T1K) Rabbit mAb recognizes endogenous levels of total OCA-T1 protein.

Species Reactivity:

Human

Source / Purification

Monoclonal antibody is produced by immunizing animals with a synthetic peptide corresponding to residues surrounding Pro150 of human OCA-T1 protein.

Background

OCA-T1 is encoded by the gene POU2AF2 (C11orf53), which was identified in a single-cell RNA sequencing study to be expressed selectively in tuft cells from mouse and human tissues (1). The expression of OCA-T1 was observed to occur in a pattern strikingly similar to that of POU2F3, a master regulator of tuft cell development whose expression also defines a tuft cell-like variant (SCLC-P) of small cell lung cancers (2). Although containing no recognizable structural domains, OCA-T1 showed minor sequence similarity with OCA-B, a protein encoded by the POU2AF1 gene and reported to be an activator of selected Class II POU domain transcription factors (3). Functional studies revealed that OCA-T1 forms a protein complex with POU2F3; these proteins furthermore share genomic binding sites and promote the expression of genes directly associated with tuft cell development. Lastly, Crispr/Cas9-mediated deletion of POU2AF2 in mice revealed that OCA-T1 is functionally required for normal tuft cell development (1). Collectively, these findings suggest that OCA-T1 is a critical component of the POU2F3-containing transcriptional complex that regulates the expression of genes governing tuft cell development.

  1. Wu, X.S. et al. (2022) Nature 607, 169-175.
  2. Huang, Y.H. et al. (2018) Genes Dev 32, 915-928.
  3. Luo, Y. et al. (1992) Cell 71, 231-41.

Species Reactivity

Species reactivity is determined by testing in at least one approved application (e.g., western blot).

Western Blot Buffer

IMPORTANT: For western blots, incubate membrane with diluted primary antibody in 5% w/v BSA, 1X TBS, 0.1% Tween® 20 at 4°C with gentle shaking, overnight.

Applications Key

WB: Western Blotting IP: Immunoprecipitation IHC-P: Immunohistochemistry (Paraffin)

Cross-Reactivity Key

H: human M: mouse R: rat Hm: hamster Mk: monkey Vir: virus Mi: mink C: chicken Dm: D. melanogaster X: Xenopus Z: zebrafish B: bovine Dg: dog Pg: pig Sc: S. cerevisiae Ce: C. elegans Hr: horse GP: Guinea Pig Rab: rabbit All: all species expected

Trademarks and Patents

Cell Signaling Technology is a trademark of Cell Signaling Technology, Inc.
All other trademarks are the property of their respective owners. Visit cellsignal.com/trademarks for more information.

Limited Uses

Except as otherwise expressly agreed in a writing signed by a legally authorized representative of CST, the following terms apply to Products provided by CST, its affiliates or its distributors. Any Customer's terms and conditions that are in addition to, or different from, those contained herein, unless separately accepted in writing by a legally authorized representative of CST, are rejected and are of no force or effect.

Products are labeled with For Research Use Only or a similar labeling statement and have not been approved, cleared, or licensed by the FDA or other regulatory foreign or domestic entity, for any purpose. Customer shall not use any Product for any diagnostic or therapeutic purpose, or otherwise in any manner that conflicts with its labeling statement. Products sold or licensed by CST are provided for Customer as the end-user and solely for research and development uses. Any use of Product for diagnostic, prophylactic or therapeutic purposes, or any purchase of Product for resale (alone or as a component) or other commercial purpose, requires a separate license from CST. Customer shall (a) not sell, license, loan, donate or otherwise transfer or make available any Product to any third party, whether alone or in combination with other materials, or use the Products to manufacture any commercial products, (b) not copy, modify, reverse engineer, decompile, disassemble or otherwise attempt to discover the underlying structure or technology of the Products, or use the Products for the purpose of developing any products or services that would compete with CST products or services, (c) not alter or remove from the Products any trademarks, trade names, logos, patent or copyright notices or markings, (d) use the Products solely in accordance with CST Product Terms of Sale and any applicable documentation, and (e) comply with any license, terms of service or similar agreement with respect to any third party products or services used by Customer in connection with the Products.

Revision 3
#49316

OCA-T1 (E4T1K) Rabbit mAb

Western Blotting Image 1: OCA-T1 (E4T1K) Rabbit mAb Expand Image
Western blot analysis of extracts from COR-L311, NCI-H526, and HeLa cells using OCA-T1 (E4T1K) Rabbit mAb (upper) or GAPDH (D16H11) XP® Rabbit mAb #5174 (lower).
Immunoprecipitation Image 1: OCA-T1 (E4T1K) Rabbit mAb Expand Image
Immunoprecipitation of OCA-T1 protein from NCI-H526 cell extracts. Lane 1 is 10% input, lane 2 is Rabbit (DA1E) mAb IgG XP® Isotype Control #3900, and lane 3 is OCA-T1 (E4T1K) Rabbit mAb. Western blot analysis was performed using OCA-T1 Antibody #20217. Anti-rabbit IgG, HRP-linked Antibody #7074 was used as a secondary antibody.
Immunohistochemistry Image 1: OCA-T1 (E4T1K) Rabbit mAb Expand Image

Immunohistochemical analysis of paraffin-embedded human large cell neuroendocrine lung carcinoma using OCA-T1 (E4T1K) Rabbit mAb.

Immunohistochemistry Image 2: OCA-T1 (E4T1K) Rabbit mAb Expand Image

Immunohistochemical analysis of paraffin-embedded normal human colon using OCA-T1 (E4T1K) Rabbit mAb.

Immunohistochemistry Image 3: OCA-T1 (E4T1K) Rabbit mAb Expand Image
Immunohistochemical analysis of paraffin-embedded human appendix using OCA-T1 (E4T1K) Rabbit mAb.
Immunohistochemistry Image 4: OCA-T1 (E4T1K) Rabbit mAb Expand Image
Immunohistochemical analysis of paraffin-embedded human esophageal carcinoma using OCA-T1 (E4T1K) Rabbit mAb.
Immunohistochemistry Image 5: OCA-T1 (E4T1K) Rabbit mAb Expand Image
Immunohistochemical analysis of paraffin-embedded normal human small intestine using OCA-T1 (E4T1K) Rabbit mAb (left) compared to concentration-matched Rabbit (DA1E) mAb IgG XP® Isotype Control #3900 (right).
Immunohistochemistry Image 6: OCA-T1 (E4T1K) Rabbit mAb Expand Image
Immunohistochemical analysis of paraffin-embedded NCI-H526 cell pellet (left, positive) or HeLa cell pellet (right, negative) using OCA-T1 (E4T1K) Rabbit mAb.