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 / CFTR c.1521_1523del / gnomAD Canada
gnomAD Canada v1.0 · HostSeq
NM_000492.4:c.1521_1523del
NP_000483.3:p.(Phe508del)  ·  CFTR
GRCh38
chr7:117,559,590 ATCT>A
GRCh37
chr7:117199644 ATCT>A
rsID
rs113993960
Type
INDEL · inframe deletion
Allele type
del · 1 alt
Cohort
HostSeq (10,487 genomes)
Flags
PASS
Allele frequency
0.9339%
172 / 18,418 alleles
PASS
Allele count
172
adjusted · raw: 172
Allele number
18,418
adjusted · raw: 18,422
Allele frequency
9.34e-03
0.9339% MAF
Homozygotes
2
alt hom carriers
grpmax FAF95
1.14e-02
European (non-Finnish) · AC=153 AN=11,738
FAF95 max
1.14e-02
European (non-Finnish)
FAF99 max
1.07e-02
European (non-Finnish)
Cohort size
10,487
whole genomes
Raw vs adjusted allele counts
ACANAFHom
Adjusted
PASS genotypes only
 17218,418 9.34e-03 2
Raw
all genotypes
 172 18,422 9.34e-03 —
Allele frequency by ancestry
GRCh38 · HostSeq genomes · Canada
Population AC AN AF Hom
African/African American
afr
 2 1,020
0.1961%
 0
Latino/Admixed American
amr
 3 838
0.3580%
 0
Ashkenazi Jewish
asj
 4 832
0.4808%
 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)grpmax
nfe
 153 11,738
1.3035%
 1
Remaining individuals
oth
 5 1,138
0.4394%
 0
South Asian
sas
 4 1,362
0.2937%
 1
Total
 172 18,418
0.9339%
 2
Population codes are displayed as sourced from gnomAD Canada v1.0 without relabelling. Bar widths scaled relative to the grpmax population (European (non-Finnish)). Grpmax FAF95 = 1.14e-02.
Filtering allele frequency (FAF)
PopulationFAF 95%FAF 99%
Overall
 8.20e-03 7.76e-03
African/African American
afr
 3.48e-04 1.45e-04
Latino/Admixed American
amr
 9.75e-04 5.20e-04
European (non-Finnish)
nfe
 1.14e-02 1.07e-02
South Asian
sas
 1.00e-03 6.04e-04
Sex-stratified allele counts are based on inferred chromosomal sex (XX / XY) from coverage of sex chromosomes in the HostSeq cohort.
XX genotypes
93 / 10,592  ·  0.8780%
PopulationACANAFHom
African/African American
afr
 2 552 0.362% 0
Latino/Admixed American
amr
 1 456 0.219% 0
Ashkenazi Jewish
asj
 2 420 0.476% 0
East Asian
eas
 0 746 — 0
European (Finnish)
fin
 0 8 — 0
Middle Eastern
mid
 0 68 — 0
European (non-Finnish)
nfe
 85 7,106 1.196% 1
Remaining individuals
oth
 2 610 0.328% 0
South Asian
sas
 1 626 0.160% 0
XY genotypes
79 / 7,826  ·  1.0095%
PopulationACANAFHom
African/African American
afr
 0 468 — 0
Latino/Admixed American
amr
 2 382 0.524% 0
Ashkenazi Jewish
asj
 2 412 0.485% 0
East Asian
eas
 0 592 — 0
European (Finnish)
fin
 0 — — 0
Middle Eastern
mid
 1 76 1.316% 0
European (non-Finnish)
nfe
 68 4,632 1.468% 0
Remaining individuals
oth
 3 528 0.568% 0
South Asian
sas
 3 736 0.408% 1
Variant quality scores
MQ
Mapping quality
249.8394
FS
Fisher strand bias · lower = better
0.0
MQRankSum
MQ rank sum test
0.0
SOR
Strand odds ratio
0.7117
ReadPosRankSum
Read position rank sum
0.091
AS_pab_max
Max posterior allele balance
1.0
RF
Random forest score
0.955
InbreedingCoeff
Inbreeding coefficient
0.0141
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
 1627 1933
Alternate
 1566 1895
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: 25 Carriers above age 80: 9
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)
18,418
Alt allele count
172
Homozygotes
2
Cross-reference links
gnomAD v4.1 (global) gnomad.broadinstitute.org
gnomAD v2.1 (exome) gnomad.broadinstitute.org
ClinVar — NM_000492.4:c.1521_1523del 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