Amnionless/AMN Antibody [Unconjugated]

• Reactivity: Hu
• Applications: WB
• Clonality: Polyclonal
• Host: Goat
• Conjugate: Unconjugated
• Concentration: LYOPH

Amnionless/AMN Antibody [Unconjugated] Summary

• Immunogen: Mouse myeloma cell line NS0-derived recombinant human Amnionless
  Val20-Ala358
  Accession # Q9BXJ7
• Specificity: Detects human Amnionless in direct ELISAs and Western blots.
• Source: N/A
• Isotype: IgG
• Clonality: Polyclonal
• Host: Goat
• Gene: AMN
• Purity Statement: Antigen Affinity-purified

Applications/Dilutions

• Dilutions:
  • Western Blot 0.1 ug/mL

Packaging, Storage & Formulations

• 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.
• Buffer: 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.
• Preservative: No Preservative
• Concentration: LYOPH
• Reconstitution Instructions: Reconstitute at 0.2 mg/mL in sterile PBS.

Notes

This product is produced by and ships from R&D Systems, Inc., a Bio-Techne brand.

Alternate Names for Amnionless/AMN Antibody [Unconjugated]

• AMN
• amnionless homolog (mouse)
• Amnionless
• PRO1028
• protein amnionless
• UNQ513/PRO1028
• visceral endoderm-specific type 1 transmembrane protein

Background

Amnionless (AMN) is an approximately 48 kDa type I transmembrane protein that is required for surface expression of the extracellular membrane-associated protein Cubilin (1‑5). The two form a complex termed CUBAM (4, 5). The 453 amino acid (aa) human AMN precursor contains a 19 aa signal sequence, a 338 aa extracellular domain (ECD), a 21 aa transmembrane domain, and a 75 aa cytoplasmic domain. The ECD contains two potential N-glycosylation sites and a cysteine-rich vWFC domain. Two cytoplasmic consensus FxNPxP/F sequences for clathrin-coated pit targeting mediate endocytosis of compounds bound by Cubulin (3, 5). The ECD of human AMN shares 67%, 66%, 76%, and 78% aa identity with mouse, rat, canine and bovine AMN, respectively. AMN is present during gastrulation in the visceral endoderm and required for primitive streak formation during embryonic development in mouse (6). Transcription from an alternate start site in humans results in an isoform starting at M55 that may also function in development (7). AMN is highly expressed on polarized epithelia in the apical brush border membranes of small intestine and kidney proximal convoluted tubules (3‑5, 7). Intestinal CUBAM is required for absorption of cobalamin (vitamin B12) when complexed with intrinsic factor (IF), and mutations of AMN or Cubilin cause Imersund-Grasbeck syndrome, also called megaloblastic anemia-1 (4, 5, 7). In the kidney, the CUBAM complex is thought to be important for reabsorption of proteins from filtrate, notably albumin and the molecules it carries (3, 8). Cubilin or CUBAM can be tightly associated with megalin, another endocytic receptor that contributes to stable expression of Cubilin, and to uptake of vitamin and lipoprotein complexes in the kidney and placenta (1, 9).

1. Kozyraki, R. and F. Gofflot (2007) Curr. Pharm. Des. 13:3038.
2. Coudroy, G. et al. (2005) J. Am. Soc. Nephrol. 16:2330.
3. Strope, S. et al. (2004) Development 131:4787.
4. He, Q. et al. (2005) Blood 106:1447.
5. Fyfe, J.C. et al. (2004) Blood 103:1573.
6. Kalantry, S. et al. (2001) Nat. Genet. 27:412.
7. Tanner, S.M. et al. (2003) Nat. Genet. 33:426.
8. Birn, H. (2006) Am. J. Physiol. Renal Physiol. 291:F22.
9. Ahuja, R. et al. (2008) Biochem. J. 410:301.

Limitations

This product is for research use only and is not approved for use in humans or in clinical diagnosis. Primary Antibodies are guaranteed for 1 year from date of receipt.

Publications for Amnionless/AMN Antibody (AF1860)(2)

Publications using AF1860

• Louise L. Jensen, Rikke K. Andersen, Henrik Hager, Mette Madsen Lack of megalin expression in adult human terminal ileum suggests megalin-independent cubilin/amnionless activity during vitamin B12 absorption Physiological Reports 2014-07-22 [PMID: 25052491]
• Louise L. Jensen, Rikke K. Andersen, Henrik Hager, Mette Madsen Lack of megalin expression in adult human terminal ileum suggests megalin-independent cubilin/amnionless activity during vitamin B12 absorption Physiological Reports 2014-07-22 [PMID: 25052491] (Immunohistochemistry, Human)

Bioinformatics

• Gene Symbol: AMN
• Uniprot:
  • Q9BXJ7()