Interim display. This page is a temporary, independent display of gnomAD Canada v1.0 data, offered until the gnomAD Canada team releases its own browser; it is not the official source. Data are provided as is, without any warranty of accuracy or completeness, and may contain errors or omissions. Verify results against the official dataset from BCGSC (bcgsc.ca/gnomad) before relying on them. For research and educational use only; not for clinical decision-making. Interim display. Not the official source; data provided as is. Verify against BCGSC.
Home / HBB c.20A>T / gnomAD Canada
gnomAD Canada v1.0 · HostSeq
NM_000518.5:c.20A>T
NP_000509.1:p.(Glu7Val)  ·  HBB
GRCh38
chr11:5,227,002 T>A
GRCh37
chr11:5248232 T>A
rsID
—
Type
MIXED · missense variant
Allele type
snv · 3 alt
Cohort
HostSeq (10,487 genomes)
Flags
was_split
Allele frequency
0.5215%
96 / 18,408 alleles
PASS
Allele count
96
adjusted · raw: 96
Allele number
18,408
adjusted · raw: 18,418
Allele frequency
5.22e-03
0.5215% MAF
Homozygotes
11
alt hom carriers
grpmax FAF95
6.83e-02
African/African American · AC=84 AN=1,018
FAF95 max
6.83e-02
African/African American
FAF99 max
6.30e-02
African/African American
Cohort size
10,487
whole genomes
Raw vs adjusted allele counts
ACANAFHom
Adjusted
PASS genotypes only
 9618,408 5.22e-03 11
Raw
all genotypes
 96 18,418 5.21e-03 —
Allele frequency by ancestry
GRCh38 · HostSeq genomes · Canada
Population AC AN AF Hom
African/African Americangrpmax
afr
 84 1,018
8.2515%
 11
Latino/Admixed American
amr
 5 838
0.5967%
 0
Ashkenazi Jewish
asj
 0 832 — 0
East Asian
eas
 0 1,338 — 0
European (Finnish)
fin
 0 8 — 0
Middle Eastern
mid
 1 144
0.6944%
 0
European (non-Finnish)
nfe
 0 11,732 — 0
Remaining individuals
oth
 1 1,136
0.0880%
 0
South Asian
sas
 5 1,362
0.3671%
 0
Total
 96 18,408
0.5215%
 11
Population codes are displayed as sourced from gnomAD Canada v1.0 without relabelling. Bar widths scaled relative to the grpmax population (African/African American). Grpmax FAF95 = 6.83e-02.
Filtering allele frequency (FAF)
PopulationFAF 95%FAF 99%
Overall
 4.37e-03 4.06e-03
African/African American
afr
 6.83e-02 6.30e-02
Latino/Admixed American
amr
 2.35e-03 1.53e-03
South Asian
sas
 1.45e-03 9.39e-04
Sex-stratified allele counts are based on inferred chromosomal sex (XX / XY) from coverage of sex chromosomes in the HostSeq cohort.
XX genotypes
54 / 10,590  ·  0.5099%
PopulationACANAFHom
African/African American
afr
 50 552 9.058% 6
Latino/Admixed American
amr
 1 456 0.219% 0
Ashkenazi Jewish
asj
 0 420 — 0
East Asian
eas
 0 746 — 0
European (Finnish)
fin
 0 8 — 0
Middle Eastern
mid
 1 68 1.471% 0
European (non-Finnish)
nfe
 0 7,106 — 0
Remaining individuals
oth
 0 608 — 0
South Asian
sas
 2 626 0.319% 0
XY genotypes
42 / 7,818  ·  0.5372%
PopulationACANAFHom
African/African American
afr
 34 466 7.296% 5
Latino/Admixed American
amr
 4 382 1.047% 0
Ashkenazi Jewish
asj
 0 412 — 0
East Asian
eas
 0 592 — 0
European (Finnish)
fin
 0 — — 0
Middle Eastern
mid
 0 76 — 0
European (non-Finnish)
nfe
 0 4,626 — 0
Remaining individuals
oth
 1 528 0.189% 0
South Asian
sas
 3 736 0.408% 0
Variant quality scores
MQ
Mapping quality
238.2928
FS
Fisher strand bias · lower = better
0.0
MQRankSum
MQ rank sum test
-0.047
SOR
Strand odds ratio
0.6899
ReadPosRankSum
Read position rank sum
-0.071
AS_pab_max
Max posterior allele balance
1.0
RF
Random forest score
0.8053
InbreedingCoeff
Inbreeding coefficient
0.2251
Region flags
LCR (low complexity region) segdup (segmental duplication) monoallelic
Allele balance · alt carriers
Allele balance distribution for alt carriers.
Expected heterozygous AB ≈ 0.5. Values near 0 or 1 may indicate homozygosity or data quality issues.
Read depth distribution (all genotypes)
Read depth distribution across all genotypes.
Genotype quality distribution
Genotype quality distribution across all genotypes.
Strand bias table (SB)
ForwardReverse
Reference
 1001 898
Alternate
 1251 1126
Genotype quality · alt carriers only
GQ distribution for alt allele carriers.
Alt-carrier GQ distribution. High GQ (≥20) indicates confident heterozygous calls.
Read depth · alt carriers only
Depth distribution for alt allele carriers.
Applied filters
PASS singleton was_split
Age at recruitment for heterozygous carriers observed in the HostSeq cohort. Age data is available only for a subset of participants.
Age distribution · heterozygous carriers
Age distribution for heterozygous carriers.
Carriers below age 30: 9 Carriers above age 80: 3
Age distribution · homozygous carriers
Age distribution for homozygous carriers.
Dataset information
Dataset name
gnomAD Canada v1.0
Cohort
HostSeq
Data type
Whole genome sequencing
Reference genome
GRCh38
Total genomes
10,487
Alleles (this variant)
18,408
Alt allele count
96
Homozygotes
11
Cross-reference links
gnomAD v4.1 (global) gnomad.broadinstitute.org
gnomAD v2.1 (exome) gnomad.broadinstitute.org
ClinVar — NM_000518.5:c.20A>T ncbi.nlm.nih.gov
Variant interpretation (LYFE Sciences) Back to full report
Acknowledgements & data use
Required attribution · gnomAD Canada v1.0
About this display
LYFE Sciences is an independent, unfunded variant interpretation tool. This page displays population frequency data from gnomAD Canada v1.0; I did not generate, fund, or contribute to this dataset. All data belongs to the gnomAD Canada project and the HostSeq cohort. I am presenting it in a convenient format alongside variant interpretation.
Data source
All population frequency data on this page originates from gnomAD Canada v1.0, produced from the HostSeq whole-genome sequencing cohort and made publicly available by the BC Genome Sciences Centre (BCGSC). The official gnomAD Canada browser is at gnomad.ca and the BCGSC instance at bcgsc.ca/gnomad. Please cite the original resource if you use this data in research.
Population labels
Population ancestry labels are reproduced exactly as provided by gnomAD Canada and the HostSeq cohort. These labels reflect ancestry inference using gnomAD v4 reference population PCA and are governed by the Indigenous data sovereignty principles of the Silent Genomes Project and the Indigenous Background Variant Library (IBVL).
Key references
1
Yoo S et al. HostSeq: a Canadian whole genome sequencing and clinical data resource. BMC Genom Data. 2023. doi:10.1186/s12863-023-01128-3
2
Chen S*, Francioli LC* et al. A genomic mutational constraint map using variation in 76,156 human genomes. Nature. 625, 92–100 (2024). doi:10.1038/s41586-023-06045-0