Human LRIG3 Antibody

Catalog #: MAB3495 Datasheet / COA / SDS

Catalog #	Availability	Size / Price	Qty
MAB3495
MAB3495-SP

Detection of Human and Mouse LRIG3 by Western Blot.

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

Human LRIG3 Antibody Summary

Species Reactivity

Human

Specificity

Detects human LRIG3 in direct ELISAs and Western blots. Detects mouse LRIG3 in Western blots. Mouse LRIG3 detection in Flow Cytometry was not tested. In direct ELISAs, no cross-reactivity with recombinant human LRIG1 is observed.

Source

Monoclonal Mouse IgG_2B Clone # 814834

Purification

Protein A or G purified from hybridoma culture supernatant

Immunogen

Mouse myeloma cell line NS0-derived recombinant human LRIG3
Asp28-Thr807
Accession # Q6UXM1

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

Flow Cytometry

2.5 µg/10⁶ cells

See below

CyTOF-ready

Ready to be labeled using established conjugation methods. No BSA or other carrier proteins that could interfere with conjugation.

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 and Mouse LRIG3 by Western Blot. Western blot shows lysates of KATO-III human gastric carcinoma cell line, HEK293T human embryonic kidney cell line, and B16-F1 mouse melanoma cell line. PVDF membrane was probed with 1 µg/mL of Mouse Anti-Human LRIG3 Monoclonal Antibody (Catalog # MAB3495) followed by HRP-conjugated Anti-Mouse IgG Secondary Antibody (Catalog # HAF007). A specific band was detected for LRIG3 at approximately 160 kDa (as indicated). This experiment was conducted under reducing conditions and using Immunoblot Buffer Group 1.

Flow Cytometry

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Detection of LRIG3 in KATO‑III Human Cell Line by Flow Cytometry. KATO-III human gastric carcinoma cell line was stained with Mouse Anti-Human LRIG3 Monoclonal Antibody (Catalog # MAB3495, filled histogram) or isotype control antibody (Catalog # MAB0041, open histogram), followed by Phycoerythrin-conjugated Anti-Mouse IgG Secondary Antibody (Catalog # F0102B).

Reconstitution Calculator

Preparation and Storage

Reconstitution

Sterile PBS to a final concentration of 0.5 mg/mL.

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: LRIG3

LRIG3 (leucine-rich repeats and Ig-like domains-3) is an approximately 140-170 kDa type I transmembrane glycoprotein member of the mammalian LRIG glycoprotein family. This family contains three members who share 45 - 50% amino acid (aa) identity (1). All members contain at least fifteen LRRs, accompanied by two flanking cysteine-rich regions, and three C2-type Ig-like domains in their extracellular domains (ECD) (1). LRIG3 mRNA is widely expressed, with highest levels in stomach, skin, thyroid and small intestine (1). Human LRIG3 is synthesized as a 1120 amino acid (aa) precursor. It contains a 24 aa signal sequence, a 786 aa ECD, a 21 aa transmembrane sequence, and a 289 aa intracellular region. One splice variant exists that has a 19 aa substitution for the first 79 aa of the standard (or long) form. This substitution appears to encode an alternate signal sequence, resulting in a mature protein that lacks the first and part of the second LRR. LRIG1, a related family member, is known to bind the EGF family receptors ErbB1-4, via either its LRR or Ig-like domains. It also binds the ubiquitin ligase, c-Cbl, and promotes ubiquitination, internalization and destruction of these receptors (2, 3). It is not known whether LRIG3 performs similar functions. Within the cell, LRIG3 is expressed in the perinuclear region as well as on the cell surface. Perinuclear location of LRIG3 in grade III and IV astrocytic tumors has been associated with better patient survival (4). Human LRIG3 ECD shares 91%, 92%, 95% and 98% aa sequence identity with mouse, rat, bovine and canine LRIG3 ECD, respectively.

References

Guo, D. et al. (2004) Genomics 84:157.
Gur, G. et al. (2004) EMBO J. 23:3270.
Laederich, M.B. (2004) J. Biol. Chem. 279:47050.
Guo, D. et al. (2006) Acta Neuropathol. (Berl.) 111:238.

Long Name

Leucine-rich Repeats and Immunoglobulin-like Domains 3

Entrez Gene IDs

121227 (Human); 320398 (Mouse)

Alternate Names

FLJ90440; KIAA3016; leucine-rich repeats and immunoglobulin-like domains 3; leucine-rich repeats and immunoglobulin-like domains protein 3; LIG-3; LIG3FLJ26573; LIRG3; LRIG3