[KSCI] Korea Science Citation Index Service

http://dx.doi.org/10.15616/BSL.2022.28.4.327

A Case of Single-step Mutations at Two Short Tandem Repeat loci (D13S317 and DXS10148) among Three Generations of a Korean Family

Byeong Ju Youn (Forensic DNA Division, National Forensic Service)
Kyungmyung Lee (Forensic DNA Division, National Forensic Service)
Cho Hee Kim (Forensic DNA Division, National Forensic Service)

Abstract

The DNA profiling of short tandem repeat (STR) markers is a powerful tool for forensic identification and forensic paternity testing. However, STR loci are susceptible to mutation that cause mismatches between parents and children when paternity is tested. Herein, we examined paternity disputes with 23 autosomal STR loci using two commercial human identification kits and revealed successive mismatches at the D13S317 locus across three generations of a Korean family. Additionally, we investigated 12 X-chromosomal STRs and discovered an inconsistency at the DXS10148 locus between the father and daughter of the same Korean family. Furthermore, we confirmed STR genotypes at the D13S317 and DXS10148 loci of the family using sequencing analysis. Consequently, we identified a successive single-step mutation at the D13S317 locus and one single-step mutation at the DXS10148 locus in three generations of the Korean family. Therefore, this case study may be useful for interpreting and understanding forensic paternity tests.

Keywords

Short tandem repeat (STR); DNA profiling; Paternity testing; Single-step mutation; Korean family;

Citations & Related Records

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