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Molecular cloning of a human dentin sialophosphoprotein gene.
Eur J Oral Sci. 2000 Feb; 108(1):35-42.EJ

Abstract

Dentin sialoprotein (DSP) and dentin phosphoprotein (DPP; phosphophoryn) are two principal dentin-specific non-collagenous proteins. DPP is extremely acidic and is rich in aspartic acid and serine. By virtue of this structure, DPP may bind large amounts of calcium and may facilitate initial mineralization of dentin matrix collagen as well as regulate the size and shape of the crystals. The function of DSP is not known. DSP and DPP are encoded by a single gene in both rat and mouse, and are uniquely expressed in odontoblasts and transiently in pre-ameloblasts. Because DSP and DPP are isolated from dentin as distinct proteins and appear to be present in different amounts, the nascent dentin sialophosphoprotein (DSPP) is likely cleaved to yield DSP and DPP. However, when, where and how the DSPP is cleaved into DSP and DPP is not clear. To further elucidate the structure and function of human DSP and DPP, we have cloned DPP and DSP cDNA by reverse transcriptase-polymerase chain reaction (RT-PCR) strategies, and then cloned and initiated characterization of a human dentin sialophosphoprotein gene. The genomic organization of human DSPP is very similar to that of mouse, containing five exons and four introns, suggesting it is a homologue of mouse dentin sialophosphoprotein (DSPP). Exons 1-4 encode for DSP, while exon 5 encodes for the C-terminus of DSP and the whole DPP. A 4.6-kb RNA transcript was detected on Northern blot analyses of total RNA extracted from immature (open root apices) human teeth using either a human DPP or DSP probe.

Authors+Show Affiliations

Department of Cariology, Restorative Sciences and Endodontics, School of Dentistry, University of Michigan, Ann Arbor 48109, USA. rongguke@umich.eduNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info available

Pub Type(s)

Journal Article
Research Support, U.S. Gov't, P.H.S.

Language

eng

PubMed ID

10706475

Citation

Gu, K, et al. "Molecular Cloning of a Human Dentin Sialophosphoprotein Gene." European Journal of Oral Sciences, vol. 108, no. 1, 2000, pp. 35-42.
Gu K, Chang S, Ritchie HH, et al. Molecular cloning of a human dentin sialophosphoprotein gene. Eur J Oral Sci. 2000;108(1):35-42.
Gu, K., Chang, S., Ritchie, H. H., Clarkson, B. H., & Rutherford, R. B. (2000). Molecular cloning of a human dentin sialophosphoprotein gene. European Journal of Oral Sciences, 108(1), 35-42.
Gu K, et al. Molecular Cloning of a Human Dentin Sialophosphoprotein Gene. Eur J Oral Sci. 2000;108(1):35-42. PubMed PMID: 10706475.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Molecular cloning of a human dentin sialophosphoprotein gene. AU - Gu,K, AU - Chang,S, AU - Ritchie,H H, AU - Clarkson,B H, AU - Rutherford,R B, PY - 2000/3/8/pubmed PY - 2000/3/11/medline PY - 2000/3/8/entrez SP - 35 EP - 42 JF - European journal of oral sciences JO - Eur J Oral Sci VL - 108 IS - 1 N2 - Dentin sialoprotein (DSP) and dentin phosphoprotein (DPP; phosphophoryn) are two principal dentin-specific non-collagenous proteins. DPP is extremely acidic and is rich in aspartic acid and serine. By virtue of this structure, DPP may bind large amounts of calcium and may facilitate initial mineralization of dentin matrix collagen as well as regulate the size and shape of the crystals. The function of DSP is not known. DSP and DPP are encoded by a single gene in both rat and mouse, and are uniquely expressed in odontoblasts and transiently in pre-ameloblasts. Because DSP and DPP are isolated from dentin as distinct proteins and appear to be present in different amounts, the nascent dentin sialophosphoprotein (DSPP) is likely cleaved to yield DSP and DPP. However, when, where and how the DSPP is cleaved into DSP and DPP is not clear. To further elucidate the structure and function of human DSP and DPP, we have cloned DPP and DSP cDNA by reverse transcriptase-polymerase chain reaction (RT-PCR) strategies, and then cloned and initiated characterization of a human dentin sialophosphoprotein gene. The genomic organization of human DSPP is very similar to that of mouse, containing five exons and four introns, suggesting it is a homologue of mouse dentin sialophosphoprotein (DSPP). Exons 1-4 encode for DSP, while exon 5 encodes for the C-terminus of DSP and the whole DPP. A 4.6-kb RNA transcript was detected on Northern blot analyses of total RNA extracted from immature (open root apices) human teeth using either a human DPP or DSP probe. SN - 0909-8836 UR - https://www.unboundmedicine.com/medline/citation/10706475/Molecular_cloning_of_a_human_dentin_sialophosphoprotein_gene_ L2 - https://onlinelibrary.wiley.com/resolve/openurl?genre=article&sid=nlm:pubmed&issn=0909-8836&date=2000&volume=108&issue=1&spage=35 DB - PRIME DP - Unbound Medicine ER -