Human LKB1/STK11 Antibody

Catalog #: MAB8055 Datasheet / COA / SDS

Catalog #	Availability	Size / Price	Qty
MAB8055
MAB8055-SP

Detection of Human LKB1/STK11 by Western Blot.

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All LKB1/STK11 Antibodies

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Summary Data Examples Preparation and Storage Reconstitution Calculator Background Product Datasheets Related Research Areas

Human LKB1/STK11 Antibody Summary

Species Reactivity

Human

Specificity

Detects human LKB1/STK11 in direct ELISAs and Western blots.

Source

Monoclonal Mouse IgG_2A Clone # 873502

Purification

Protein A or G purified from hybridoma culture supernatant

Immunogen

E. coli-derived recombinant human LKB1/STK11
Met1-Gln433
Accession # Q15831

Formulation

Lyophilized from a 0.2 μm filtered solution in PBS with Trehalose. *Small pack size (SP) is supplied either lyophilized or as a 0.2 µm filtered solution in PBS.

Label

Unconjugated

Applications

Recommended Concentration

Sample

Western Blot

1 µg/mL

See below

Knockout Validated

LKB1/STK11 is specifically detected in HEK293T human embryonic kidney parental cell line but is not detectable in LKB1/STK11 knockout HEK293T cell line.

Please Note: Optimal dilutions should be determined by each laboratory for each application. General Protocols are available in the Technical Information section on our website.

Scientific Data

Western Blot

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Detection of Human LKB1/STK11 by Western Blot. Western blot shows lysates of MCF-7 human breast cancer cell line, HepG2 human hepatocellular carcinoma cell line, and K562 human chronic myelogenous leukemia cell line. PVDF membrane was probed with 1 µg/mL of Mouse Anti-Human LKB1/STK11 Monoclonal Antibody (Catalog # MAB8055) followed by HRP-conjugated Anti-Mouse IgG Secondary Antibody (Catalog # HAF018). A specific band was detected for LKB1/STK11 at approximately 55 kDa (as indicated). This experiment was conducted under reducing conditions and using Immunoblot Buffer Group 1.

Knockout Validated

Western Blot Shows Human LKB1/STK11 Antibody Specificity by Using Knockout Cell Line.

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Western Blot Shows Human LKB1/STK11 Specificity by Using Knockout Cell Line. Western blot shows lysates of HEK293T human embryonic kidney parental cell line and LKB1/STK11 knockout HEK293T cell line (KO). PVDF membrane was probed with 1 µg/mL of Mouse Anti-Human LKB1/STK11 Monoclonal Antibody (Catalog # MAB8055) followed by HRP-conjugated Anti-Mouse IgG Secondary Antibody (Catalog # HAF018). A specific band was detected for LKB1/STK11 at approximately 55 kDa (as indicated) in the parental HEK293T cell line, but is not detectable in knockout HEK293T cell line. GAPDH (Catalog # MAB5718) is shown as a loading control. This experiment was conducted under reducing conditions and using Immunoblot Buffer Group 1.

Reconstitution Calculator

Preparation and Storage

Reconstitution

Reconstitute at 0.5 mg/mL in sterile PBS.

Shipping

Lyophilized product is shipped at ambient temperature. Liquid small pack size (-SP) is shipped with polar packs. Upon receipt, store immediately at the temperature recommended below.

Stability & Storage

Use a manual defrost freezer and avoid repeated freeze-thaw cycles.

12 months from date of receipt, -20 to -70 °C as supplied.
1 month, 2 to 8 °C under sterile conditions after reconstitution.
6 months, -20 to -70 °C under sterile conditions after reconstitution.

Background: LKB1/STK11

LKB1, also known as STK11 and JBS, is a 55 kDa member of the CAMK Ser/Thr protein kinase family. It is ubiquitously expressed, and considered to be a tumor suppressor. LKB1 is both nuclear and cytoplasmic, and appears to contribute to cell polarization, G1 cell cycle arrest and Wnt signaling. It is known to complex with STRAD and CAB39/MO25, and phosphorylate PTEN plus p53. Human LKB1 is 433 amino acids (aa) in length. It contains a protein kinase domain (aa 49‑309) and a prenylation motif (CysLysGlnGln) over aa 430‑433. Phosphorylation on Ser428 promotes the ability of LKB1 to suppress G361 cell growth. There are two potential isoforms of LKB1. One shows a nine aa insertion after Tyr126, while another shows a 34 aa substitution for aa 371‑433. Human LKB1 shares 90% aa sequence identity with mouse and rat LKB1.

Long Name

Serine/threonine Protein Kinase LKB1

Entrez Gene IDs

6794 (Human); 20869 (Mouse); 314621 (Rat)

Alternate Names

EC 2.7.11.1; LKB1 serine/threonine kinase 11 (Peutz-Jeghers syndrome); LKB1; PJS polarization-related protein LKB1; PJS; Renal carcinoma antigen NY-REN-19; serine/threonine kinase 11; serine/threonine-protein kinase 11; Serine/threonine-protein kinase LKB1; STK11