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Sequence-based US population data for the SE33 locus.

Lisa A Borsuk1, Katherine B Gettings1, Carolyn R Steffen1

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Summary
This summary is machine-generated.

This study analyzed SE33 short tandem repeat (STR) variation in 1036 U.S. samples using next-generation sequencing. Sequence data revealed extensive SE33 allelic diversity, achieving 100% concordance with traditional methods.

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ForensicSE33SequencingShort tandem repeat

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Area of Science:

  • Forensic genetics
  • Human identification
  • Next-generation sequencing applications

Background:

  • Illumina ForenSeq DNA Signature Prep Kit generates FASTQ files with unanalyzed STR loci.
  • SE33, DXS8377, DXS10148, DYS456, and DYS461 are STR loci not typically reported by standard software.
  • High-quality human identification relies on comprehensive STR marker analysis.

Purpose of the Study:

  • To characterize sequence variation within the SE33 autosomal STR marker.
  • To identify and analyze SE33 alleles in a 1036 U.S. population sample set.
  • To compare sequence-based SE33 allele calls with capillary electrophoresis-based typing results.

Main Methods:

  • Sequencing of 1036 U.S. population samples using the Illumina ForenSeq DNA Signature Prep Kit.
  • Customized bioinformatic analysis of FASTQ files to evaluate SE33 sequence variation.
  • Manual sequence curation and comparison with length-based genotypes for allele calling.

Main Results:

  • Identification of 53 unique alleles by length and 264 by sequence at the SE33 locus.
  • Detection of an additional 10 alleles by examining extended flanking regions.
  • 100% concordance between sequence-based and capillary electrophoresis-based SE33 allele calls after manual review.

Conclusions:

  • Sequence-based analysis of SE33 provides high-resolution allelic data.
  • Challenges in SE33 sequence data interpretation include noise, coverage variance, and heterozygote imbalance.
  • This comprehensive SE33 analysis enhances human identification capabilities.