DMBT1

DMBT1
Identifiers
Aliases	DMBT1, GP340, muclin, SAG, deleted in malignant brain tumors 1, SALSA
External IDs	OMIM: 601969 MGI: 106210 HomoloGene: 68990 GeneCards: DMBT1
Gene location (Human) Chr. Chromosome 10 (human) Band 10q26.13 Start 122,560,665 bp End 122,643,736 bp
Gene location (Mouse) Chr. Chromosome 7 (mouse) Band 7|7 F3 Start 130,633,776 bp End 130,723,357 bp
RNA expression pattern Bgee Human Mouse (ortholog) Top expressed in parotid gland trachea jejunal mucosa duodenum palpebral conjunctiva pancreatic ductal cell gallbladder minor salivary glands lower lobe of lung appendix Top expressed in gallbladder lacrimal gland pyloric antrum large intestine colon duodenum left colon crypt of lieberkuhn of small intestine Paneth cell jejunum More reference expression data BioGPS More reference expression data
Gene ontology Molecular function pattern recognition receptor activity calcium-dependent protein binding protein binding zymogen binding lipopolysaccharide binding DNA binding scavenger receptor activity lipoteichoic acid binding heparan sulfate binding Cellular component cytoplasm phagocytic vesicle membrane membrane zymogen granule membrane extracellular region extracellular exosome extrinsic component of membrane extracellular space external side of plasma membrane extracellular matrix Biological process cell differentiation epithelial cell differentiation multicellular organism development defense response to virus protein transport innate immune response viral process pattern recognition receptor signaling pathway receptor-mediated endocytosis transport induction of bacterial agglutination defense response to Gram-negative bacterium defense response to Gram-positive bacterium antimicrobial humoral immune response mediated by antimicrobial peptide vesicle-mediated transport endocytosis Sources:Amigo / QuickGO
Orthologs Species Human Mouse Entrez 1755 12945 Ensembl ENSG00000187908 ENSMUSG00000047517 UniProt Q9UGM3 Q60997 RefSeq (mRNA) NM_004406 NM_007329 NM_017579 NM_001320644 NM_001377530 NM_007769 NM_001347632 RefSeq (protein) NP_001307573 NP_004397 NP_015568 NP_060049 NP_001334561 NP_031795 Location (UCSC) Chr 10: 122.56 – 122.64 Mb Chr 7: 130.63 – 130.72 Mb PubMed search
Wikidata
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Deleted in malignant brain tumors 1 protein is a protein that in humans is encoded by the DMBT1 gene.

Function

Loss of sequences from human chromosome 10q has been associated with the progression of human cancers. The gene DMBT1 was originally isolated based on its deletion in a medulloblastoma cell line. DMBT1 is expressed with transcripts of 6.0, 7.5, and 8.0 kb in fetal lung and with one transcript of 8.0 kb in adult lung, although the 7.5 kb transcript has not been characterized. The DMBT1 protein is a glycoprotein containing multiple scavenger receptor cysteine-rich (SRCR) domains separated by SRCR-interspersed domains (SID). Transcript variant 2 (8.0 kb) has been shown to bind surfactant protein D independently of carbohydrate recognition. This indicates that DMBT1 may not be a classical tumor suppressor gene, but rather play a role in the interaction of tumor cells and the immune system.

Pattern recognition and potential use of DMBT1 in nanomedicine

At epithelial barriers molecular pattern recognition mechanisms act as minesweepers against harmful environmental factors and thereby play a crucial role in the defense against invading bacterial and viral pathogens. However, it became evident that some of the proteins participating in these host defense processes may simultaneously function as regulators of tissue regeneration when in the extracellular matrix, thus coupling defense functions with regulation of stem cells. Although molecular pattern recognition has complex physiological roles and we just begin to understand its various functions, the simplicity of the underlying principles for recognition of specific classes of molecules may generate novel starting points for nanomedical approaches in drug delivery across epithelial barriers. The protein DMBT1, showed pattern recognition activity for poly-sulfated and poly-phosphorylated ligands, including nucleic acids, and the ability to aggregate ligands. This raises the interesting question in how far these properties can be utilized to assemble nucleic acidpeptide nano-complexes and whether this can be exploited to modulate the pharmacological properties of nucleic acids and/or for nucleic acid delivery to target cells Recently, DMBT1-derived peptides have been successfully harnessed for siRNA intracellular delivery.

Interactions

DMBT1 has been shown to interact with Surfactant protein D. DMBT1-derived peptides also interacts with nucleic acids.

Further reading

• Kang W, Reid KB (2003). "DMBT1, a regulator of mucosal homeostasis through the linking of mucosal defense and regeneration?". FEBS Lett. 540 (1–3): 21–5. doi:10.1016/S0014-5793(03)00217-5. PMID 12681477. S2CID 36334379.
• Robbe C, Paraskeva C, Mollenhauer J, Michalski JC, Sergi C, Corfield A (2005). "DMBT1 expression and glycosylation during the adenoma-carcinoma sequence in colorectal cancer". Biochem. Soc. Trans. 33 (Pt 4): 730–2. doi:10.1042/BST0330730. PMID 16042587.
• Rasheed BK, McLendon RE, Friedman HS, Friedman AH, Fuchs HE, Bigner DD, Bigner SH (1995). "Chromosome 10 deletion mapping in human gliomas: a common deletion region in 10q25". Oncogene. 10 (11): 2243–6. PMID 7784070.
• Holmskov U, Lawson P, Teisner B, Tornoe I, Willis AC, Morgan C, Koch C, Reid KB (1997). "Isolation and characterization of a new member of the scavenger receptor superfamily, glycoprotein-340 (gp-340), as a lung surfactant protein-D binding molecule". J. Biol. Chem. 272 (21): 13743–9. doi:10.1074/jbc.272.21.13743. PMID 9153228.
• Mori M, Shiraishi T, Tanaka S, Yamagata M, Mafune K, Tanaka Y, Ueo H, Barnard GF, Sugimachi K (1999). "Lack of DMBT1 expression in oesophageal, gastric and colon cancers". Br. J. Cancer. 79 (2): 211–3. doi:10.1038/sj.bjc.6690035. PMC 2362205. PMID 9888459.
• Tino MJ, Wright JR (1999). "Glycoprotein-340 binds surfactant protein-A (SP-A) and stimulates alveolar macrophage migration in an SP-A-independent manner". Am. J. Respir. Cell Mol. Biol. 20 (4): 759–68. doi:10.1165/ajrcmb.20.4.3439. PMID 10101009.
• Holmskov U, Mollenhauer J, Madsen J, Vitved L, Gronlund J, Tornoe I, Kliem A, Reid KB, Poustka A, Skjodt K (1999). "Cloning of gp-340, a putative opsonin receptor for lung surfactant protein D". Proc. Natl. Acad. Sci. U.S.A. 96 (19): 10794–9. Bibcode:1999PNAS...9610794H. doi:10.1073/pnas.96.19.10794. PMC 17962. PMID 10485905.
• Takeshita H, Sato M, Shiwaku HO, Semba S, Sakurada A, Hoshi M, Hayashi Y, Tagawa Y, Ayabe H, Horii A (1999). "Expression of the DMBT1 gene is frequently suppressed in human lung cancer". Jpn. J. Cancer Res. 90 (9): 903–8. doi:10.1111/j.1349-7006.1999.tb00833.x. PMC 5926167. PMID 10551316.
• Mollenhauer J, Holmskov U, Wiemann S, Krebs I, Herbertz S, Madsen J, Kioschis P, Coy JF, Poustka A (1999). "The genomic structure of the DMBT1 gene: evidence for a region with susceptibility to genomic instability". Oncogene. 18 (46): 6233–40. doi:10.1038/sj.onc.1203071. PMID 10597221. S2CID 12085482.
• Prakobphol A, Xu F, Hoang VM, Larsson T, Bergstrom J, Johansson I, Frängsmyr L, Holmskov U, Leffler H, Nilsson C, Borén T, Wright JR, Strömberg N, Fisher SJ (2000). "Salivary agglutinin, which binds Streptococcus mutans and Helicobacter pylori, is the lung scavenger receptor cysteine-rich protein gp-340". J. Biol. Chem. 275 (51): 39860–6. doi:10.1074/jbc.M006928200. PMID 11007786.
• Ma JF, Takito J, Vijayakumar S, Peehl DM, Olsson CA, Al-Awqati Q (2001). "Prostatic expression of hensin, a protein implicated in epithelial terminal differentiation". Prostate. 49 (1): 9–18. doi:10.1002/pros.1113. PMID 11550206. S2CID 33550624.
• Ligtenberg TJ, Bikker FJ, Groenink J, Tornoe I, Leth-Larsen R, Veerman EC, Nieuw Amerongen AV, Holmskov U (2001). "Human salivary agglutinin binds to lung surfactant protein-D and is identical with scavenger receptor protein gp-340". Biochem. J. 359 (Pt 1): 243–8. doi:10.1042/0264-6021:3590243. PMC 1222141. PMID 11563989.
• Mollenhauer J, Herbertz S, Helmke B, Kollender G, Krebs I, Madsen J, Holmskov U, Sorger K, Schmitt L, Wiemann S, Otto HF, Gröne HJ, Poustka A (2001). "Deleted in Malignant Brain Tumors 1 is a versatile mucin-like molecule likely to play a differential role in digestive tract cancer". Cancer Res. 61 (24): 8880–6. PMID 11751412.
• Bikker FJ, Ligtenberg AJ, van der Wal JE, van den Keijbus PA, Holmskov U, Veerman EC, Nieuw Amerongen AV (2002). "Immunohistochemical detection of salivary agglutinin/gp-340 in human parotid, submandibular, and labial salivary glands". J. Dent. Res. 81 (2): 134–9. doi:10.1177/154405910208100210. PMID 11829014.
• Sasaki H, Betensky RA, Cairncross JG, Louis DN (2002). "DMBT1 polymorphisms: relationship to malignant glioma tumorigenesis". Cancer Res. 62 (6): 1790–6. PMID 11912156.
• Schulz BL, Oxley D, Packer NH, Karlsson NG (2002). "Identification of two highly sialylated human tear-fluid DMBT1 isoforms: the major high-molecular-mass glycoproteins in human tears". Biochem. J. 366 (Pt 2): 511–20. doi:10.1042/BJ20011876. PMC 1222789. PMID 12015815.
• Bikker FJ, Ligtenberg AJ, Nazmi K, Veerman EC, van't Hof W, Bolscher JG, Poustka A, Nieuw Amerongen AV, Mollenhauer J (2002). "Identification of the bacteria-binding peptide domain on salivary agglutinin (gp-340/DMBT1), a member of the scavenger receptor cysteine-rich superfamily". J. Biol. Chem. 277 (35): 32109–15. doi:10.1074/jbc.M203788200. PMID 12050164.
• Fan X, Muñoz J, Sanko SG, Castresana JS (2002). "PTEN, DMBT1, and p16 alterations in diffusely infiltrating astrocytomas". Int. J. Oncol. 21 (3): 667–74. doi:10.3892/ijo.21.3.667. PMID 12168116.
• Mueller W, Mollenhauer J, Stockhammer F, Poustka A, von Deimling A (2002). "Rare mutations of the DMBT1 gene in human astrocytic gliomas". Oncogene. 21 (38): 5956–9. doi:10.1038/sj.onc.1205733. PMID 12185598. S2CID 21374969.