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»ó¾ÆÁú Çü¼ººÎÀüÁõ Á¦ II ÇüÀÇ ¿øÀÎÀÌ µÇ´Â Frameshift µ¹¿¬º¯ÀÌ

A Frameshift Mutation causes Dentinogenesis Imperfecta Type II

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È«Áö¿ø ( Hong Ji-won ) - ¼­¿ï´ëÇб³ Ä¡ÀÇÇдëÇпø ¼Ò¾ÆÄ¡°úÇб³½Ç
½ÅÅÍÀü ( Shin Teo-Jeon ) - ¼­¿ï´ëÇб³ Ä¡ÀÇÇдëÇпø ¼Ò¾ÆÄ¡°úÇб³½Ç
ÇöÈ«±Ù ( Hyun Hong-Keun ) - ¼­¿ï´ëÇб³ Ä¡ÀÇÇдëÇпø ¼Ò¾ÆÄ¡°úÇб³½Ç
±è¿µÀç ( Kim Young-Jae ) - ¼­¿ï´ëÇб³ Ä¡ÀÇÇдëÇпø ¼Ò¾ÆÄ¡°úÇб³½Ç
ÀÌ»óÈÆ ( Lee Sang-Hoon ) - ¼­¿ï´ëÇб³ Ä¡ÀÇÇдëÇпø ¼Ò¾ÆÄ¡°úÇб³½Ç
±èÁ¤¿í ( Kim Jung-Wook ) - ¼­¿ï´ëÇб³ Ä¡ÀÇÇдëÇпø ¼Ò¾ÆÄ¡°úÇб³½Ç

Abstract

»ó¾ÆÁú Çü¼ººÎÀüÁõ Á¦ II ÇüÀº »ó¾ÆÁú ±âÁú¿¡ ¿µÇâÀ» ¹ÌÄ¡´Â À¯ÀüÁúȯÀ¸·Î dentin sialophosphoprotien(DSPP)ÀÇ µ¹¿¬º¯ÀÌ¿¡ ±âÀÎÇÑ´Ù. DSPP ¹ßÇö »ê¹° Áß ÇϳªÀÎ dentin phosphoprotein(DPP)Àº Asp-Ser-Ser ¼­¿­ÀÌ ¹Ýº¹µÇ´Â µ¶Æ¯ÇÑ ±¸Á¶·Î, »ó¾ÆÁú ¼®È¸È­ ¼º¼÷ °úÁ¤¿¡ °ü¿©ÇÑ´Ù. º» ¿¬±¸´Â DPP ¿µ¿ªÀ» Æ÷ÇÔÇÑ DSPP À¯ÀüÀÚ ¿°±â ¼­¿­ ºÐ¼®À» ÅëÇÏ¿© À¯Àü¼º »ó¾ÆÁú °áÇÔÀÇ ¿øÀÎÀÌ µÇ´Â µ¹¿¬º¯À̸¦ È®ÀÎÇÏ°íÀÚ ÇÏ¿´´Ù. ÀÓ»óÀû ¹× ¹æ»ç¼±ÇÐÀû °Ë»ç¿Í DSPP À¯ÀüÀÚ ¿°±â ¼­¿­ ºÐ¼® ¹× DPP ¿µ¿ªÀÇ allele-specific cloningÀ» ½ÃÇàÇÏ¿© ºñ±³ ºÐ¼®ÇÑ °á°ú, 2688¹ø ¿°±âÀΠƼ¹ÎÀÇ °á½Ç(c.2688delT)ÀÌ È®ÀÎ µÇ¾ú°í, -1 bp frameshift µ¹¿¬º¯À̸¦ ¾ß±âÇÏ¿´´Ù. À̴ ģ¼ö¼º ¾Æ¹Ì³ë»êÀ» ¼Ò¼ö¼ºÀ¸·Î ġȯ½ÃÄÑ, DPP Ư¼ºÀÇ º¯È­ ¹× »óÈ£ÀÛ¿ë ´É·Â ÀúÇϸ¦ ÀÏÀ¸ÄÑ »ó¾ÆÁú Çü¼ººÎÀüÁõ Á¦ II ÇüÀÇ ¿øÀÎÀ¸·Î ÀÛ¿ëÇÏ¿´´Ù.

Dentinogenesis imperfecta type II (DGI-II) is an inherited disorder affecting the dentin matrix and is related to mutations in the dentin sialophosphoprotein (DSPP) gene. The protein encoded by the DSPP gene undergoes extensive posttranslational modifications. Dentin phosphoprotein (DPP), one of the DSPP expressed products, has unique composition with highly repetitive Asp-Ser-Ser amino acid residues and is related to the maturation of dentin mineralization. We aimed to identify mutation in DSPP, including the DPP coding region, contributing to inherited dentin defects in a Korean family with DGI-II. Clinical and radiographic examinations were performed, and all five exons and exon-intron boundaries of the DSPP gene were sequenced. Additionally, allele-specific cloning for highly repetitive DPP region was performed. By sequencing and cloning, a heterozygous single nucleotide deletion (c.2688delT) was identified. The identified mutation caused a frameshift in the DPP coding region. This frameshift mutation would introduce hydrophobic amino acids instead of hydrophilic amino acids and would result in a change in the characteristics of DPP.

Å°¿öµå

»ó¾ÆÁú Çü¼ººÎÀüÁõ; Dentin sialophosphoprotein; Dentin phosphoprotein; Frameshift µ¹¿¬º¯ÀÌ
Dentinogenesis imperfecta ;Dentin sialophosphoprotein ;Dentin phosphoprotein ;Frameshift mutation

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