Revision 4

#23065Store 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, IF-F, IF-IC, eCLIP

REACTIVITY:

H M R Mk

SENSITIVITY:

Endogenous

MW (kDa):

38, 42

Source/Isotype:

Rabbit IgG

UniProt ID:

#Q96PU8

Entrez-Gene Id:

9444

Product Information

Product Usage Information

Application Dilution
Western Blotting 1:1000
Immunoprecipitation 1:100
Immunofluorescence (Frozen) 1:400 - 1:800
Immunofluorescence (Immunocytochemistry) 1:400 - 1:1600
eCLIP 1:200
For more information about the RBP-eCLIP service please visit Eclipsebio.

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.

Specificity / Sensitivity

QKI (E7O4A) Rabbit mAb recognizes endogenous levels of total QKI protein.

Species Reactivity:

Human, Mouse, Rat, Monkey

Source / Purification

Monoclonal antibody is produced by immunizing animals with a synthetic peptide corresponding to residues surrounding Pro11 of human QKI protein.

Background

Quaking (QKI) is a member of the signal transduction and activator of RNA (STAR) protein family of RNA-binding proteins (1,2). Mutations in the mouse Qki locus results in impaired myelin formation resulting in tremors (3). QKI proteins exist as homodimers, and disruption of the dimerization process is lethal in mice (2). QKI exists in different isoforms that differ in their C-terminus, resulting in unique subcellular localizations (4). The nuclear isoform of QKI, QKI-5, is involved in regulation of alternative splicing of MAG mRNA, which encodes for a protein important for myelin sheath formation and maintenance (4,5). QKI has also been implicated in schizophrenia and oligodendrocyte differentiation (6). QKI can function as a tumor suppressor, as it is regulated by p53 to stabilize miRNAs that regulate TGF-β signaling (7).

  1. Vernet, C. and Artzt, K. (1997) Trends Genet 13, 479-84.
  2. Chen, T. and Richard, S. (1998) Mol Cell Biol 18, 4863-71.
  3. SIDMAN, R.L. et al. (1964) Science 144, 309-11.
  4. Wu, J. et al. (1999) J Biol Chem 274, 29202-10.
  5. Wu, J.I. et al. (2002) Proc Natl Acad Sci U S A 99, 4233-8.
  6. Aberg, K. et al. (2006) Proc Natl Acad Sci U S A 103, 7482-7.
  7. Chen, A.J. et al. (2012) Genes Dev 26, 1459-72.

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 IF-F: Immunofluorescence (Frozen) IF-IC: Immunofluorescence (Immunocytochemistry) eCLIP: eCLIP

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

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