ACTBP2-nomenclature recommendations of GEDNAP

Area of Science:

• Forensic Genetics
• Molecular Biology
• Population Genetics

Background:

• The ACTBP2 (SE33) short tandem repeat (STR) system is complex, posing challenges for standardized data interpretation.
• Facilitating international data exchange requires a consistent nomenclature for complex genetic markers.

Purpose of the Study:

• To propose and validate a standardized nomenclature system for the ACTBP2 (SE33) STR locus.
• To ensure the proposed nomenclature aligns with International Society of Forensic Genetics (ISFH) recommendations where feasible.
• To assess the reproducibility and robustness of the nomenclature system across multiple laboratories.

Main Methods:

• Development of a novel nomenclature system for the ACTBP2 (SE33) STR alleles.
• Conducting a blind trial involving up to 20 laboratories to test nomenclature reproducibility under operational conditions.
• Performing population studies to analyze allele frequencies and identify regional variations.

Main Results:

• The proposed nomenclature system was successfully implemented and tested in a multi-laboratory blind trial.
• The nomenclature demonstrated high reproducibility among participating laboratories.
• Population studies revealed minimal regional differences in ACTBP2 (SE33) allele frequencies, indicating system robustness.

Conclusions:

• The developed nomenclature system is effective for standardizing ACTBP2 (SE33) STR data.
• The system facilitates reliable data exchange between forensic laboratories.
• The nomenclature is robust and applicable across different populations.