PentaD

Other Autosomal STRs

PentaD is a pentanucleotide short tandem repeat (STR) locus on chromosome 21 (21q22.3), an autosomal STR outside the CODIS core set.

Basic Information

Chromosome

Cytogenetic Location

21q22.3

STRNaming template (FSSG)

A[8]GAAAG[1]AAAAG[n]A[6]

Type

Pentanucleotide

Alternative motifs (STRbase, historical notation)

[AAAGA]n rs1190908807

Reference Allele

Explore internal sequence structure

See how the STRNaming name of the reference allele maps onto its sequence: repeat blocks, flanking regions and flanking variants.

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Genomic Coordinates

GRCh38/hg38

Repeat region

chr21:43,636,205-43,636,269 (65 bp)

GRCh37/hg19

Repeat region

chr21:45,056,086-45,056,150 (65 bp)

Motif and sequences are shown on the forward (+) strand of GRCh38.

Sequence structure (FSSG)

ISFG minimum range, bracketing and kit coverage from the Forensic Sequence Structure Guide, FSSG v6.1 (STRidER; distributed as FSSG_v6-1_beta.xlsx).

STRNaming Formatted ISFG Minimum Range for Common Alleles (FSSG)

A[8]GAAAG[1]AAAAG[n]A[6]

AAAAG[n]A[6]

Reference allele (GRCh38) named with STRNaming 1.2.1

CE13_A[8]GAAAG[1]AAAAG[12]A[6]

Historical bracketing (2016-2023)

[AAAGA]13

ISFG minimum range (GRCh38)

chr21:43,636,185-43,636,282 (98 bp)

MPS kits covering this locus

PowerSeq 46GY
ForenSeq Signature Prep/Plus and MainstAY
Precision ID GlobalFiler NGS STR Panel v2 (Does not cover the whole ISFG minimum range.)
IDSeek OmniSTR Global (Does not cover the whole ISFG minimum range.)

Kit range does not cover the whole ISFG minimum range of this locus (chr21:43,636,185-43,636,282), according to the kit ranges in the FSSG. Bases of the minimum range outside a kit's range are not sequenced by that kit; bases filled in from the reference should be identified as such.

Allele frequencies at a glance

Most common allele per population group, with its frequency and the sample size, in the capillary electrophoresis data of pop.STR / SP-SMART.

Africa: Allele 2.2 (0.204, n = 103)
Native American: Allele 9 (0.176, n = 549)
East Asia: Allele 9 (0.335, n = 224)
Central and South Asia: Allele 11 (0.250, n = 202)
Europe: Allele 12 (0.208, n = 156)
Middle East: Allele 11 (0.216, n = 160)
Oceania: Allele 10 (0.346, n = 26)

Allele frequencies by population group (pop.STR, CE). Alleles absent from every group are omitted.
Allele	AFR	NAM	EAS	CSA	EUR	MES	OCE
2.2	0.204	0.080	0	0.015	0	0.022	0
3.2	0.010	0.003	0	0	0	0	0
5	0.039	0.018	0	0	0	0	0
6	0.019	0.001	0.007	0	0.003	0.003	0
7	0.053	0.018	0.016	0	0.003	0.016	0
8	0.155	0.045	0.040	0.025	0.013	0.041	0.038
9	0.141	0.176	0.335	0.220	0.196	0.197	0.077
10	0.126	0.152	0.112	0.153	0.122	0.150	0.346
11	0.087	0.139	0.172	0.250	0.183	0.216	0.288
12	0.092	0.147	0.150	0.129	0.208	0.106	0.135
13	0.063	0.146	0.129	0.158	0.176	0.144	0.019
14	0.005	0.059	0.036	0.037	0.071	0.047	0.038
15	0.005	0.015	0.004	0.005	0.016	0.031	0.019
16	0	0.002	0	0.007	0.006	0.025	0
17	0	0	0	0	0.003	0.003	0.038

Allele frequencies by population group (pop.STR, CE). Alleles absent from every group are omitted.

Variant Alleles

STRbase reports 80 sequence variants across 17 allele designations.

2.2

3.2

13.4

Related markers

Other STR markers on chromosome 21

D21S11

Other autosomal STRs

Browse the full STR marker catalog