hu8A5FBF (23andme_X_Y_MT) - GET-Evidence variant report

Variant report for hu8A5FBF (23andme_X_Y_MT)

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VariantClinical
Importance
ImpactAllele
freq
Summary
1PRPH-D141YHighUncertainUncertain pathogenic

Recessive, Carrier (Heterozygous)
0.00365206Hypothesized to cause ALS (or increased susceptibility) in a recessive manner, but this is based on a single observation and may lack statistical significance. The mutant protein appears to form abnormal aggregates.1
2COL4A1-Q1334HLowLikelyLikely pathogenic

Dominant, Heterozygous
0.324689This common variant has been associated with arterial stiffness and, in Japanese, a small increased risk of myocardial infarction (MI, a.k.a. heart attack). This last observation supported a dominant effect for this variant and, assuming a lifetime risk of 15% for MI, we estimate carriers have an additional risk of 0.5-3%.1
3PIGR-A580VLowLikelyLikely pathogenic

Complex/Other, Heterozygous
0.247537In a Japanese study, this variant was associated with an increased risk for immunoglobulin A nephropathy (IgAN), a rare disease. The chances of having this disease, even with this variant, is less than 0.1%.1
4rs5186LowLikelyLikely pathogenic

Unknown, Homozygous
0.214878This common noncoding genetic variant has an allele frequency of ~30% and is associated with an increased risk of hypertension. If ~25% of non-carriers have hypertension, Bonnardeaux et al's data predict ~4% increased risk of hypertension per copy of this variant. This SNP is in the 3' noncoding region of the AGTR1 transcript (angiotensin II type 1 receptor), also known as AT2R1 or AT1R, which is a target of hypertension drugs.1
5MTRR-I49MLowLikelyLikely pathogenic

Recessive, Carrier (Heterozygous)
0.451199This common variant (HapMap allele frequency of 31.3%) in a protein involved in folate (B9) and cobalamin (B12) metabolism and is often reported as "MTRR I22M" (an alternative transcript position). Mothers homozygous for this variant are associated with having around a increased chance of a child with Down syndrome (risk of 0.4%, average risk in population is 0.25%). Notably, age plays a far larger role in the rate of Down syndrome (risk is 4.5% for a mother 45-years-of-age), and it is unknown how this variant may combine with the effect of age. There are conflicting reports associating this variant with incidence of neural tube defects, possibly when combined with MTHFR A222V.1
6WFS1-R611HLowUncertainUncertain not reviewed

Recessive, Homozygous
0.400446This nonsynonymous SNP is associated with Wolfram Syndrome (known as DIDMOAD), which is characterized by early-onset non-autoimmune diabetes mellitus, diabetes insipidus, optic atrophy, and deafness) and to adult Type Two Diabetes Mellitus. The WFS1 gene maps to chromosome 4p16.3. The variant has been shown to be statistically associated with type II diabetes in six UK studies and one study of Ashkenazi Jews (Sandhu, M., et al., Minton et al.).1
7ELAC2-S217LLowUncertainUncertain pathogenic

Complex/Other, Homozygous
0.273471Reported to be associated with increased susceptibility to prostate cancer, but later studies weaken the hypothesis. Xu et al.'s meta-analysis concludes that there is a small but significant increased risk (OR = 1.13). Assuming a lifetime risk of 16% for prostate cancer we calculate this leads to an increased risk of ~1.5% (17.5% total).1
8H6PD-R453QLowUncertainUncertain pathogenic

Recessive, Carrier (Heterozygous)
0.308886This common variant may have a small pathogenic effect by contributing to cortisone reductase deficiency (a rare abnormality) when homozygous and combined with a serious pathogenic variant. The same authors have tested and ruled out a contribution to polycystic ovary syndrome (similar phenotype, more common disease).1
9SP110-L425SLowUncertainUncertain pathogenic

Unknown, Homozygous
0.863357This variant is associated with a slightly increased risk of tuberculosis. It is unclear whether it is itself causal, or in linkage disequilibrium with some other causal variant that has a stronger effect.1
10TP53-P72RLowUncertainUncertain pathogenic

Unknown, Homozygous
0.627743This is a common variant was first reported as a polymorphism. It has since had mixed associations with cancer: Storey et al. conclude a 7x *increased* risk of HPV cancer for homozygotes vs hets, but Jones et al. find a 1.98x *decreased* risk for colorectal cancer. This variant may have significant impact on particular cancers, but it is unclear what effect it has on the overall burden of cancer.1
11HFE-H63DLowUncertainUncertain pathogenic

Recessive, Carrier (Heterozygous)
0.109965There have been some hypotheses that this variant contributes to causing hereditary hemochromatosis, possibly as a compound heterozygote, but some others treat it as a polymorphism. Cys282Tyr is the classic causal variant and itself has very low penetrance. Mouse studies indicates this variant has a similar but weaker effect; if it has any effect at all its penetrance may be quite low and/or require modifier alleles.1
12BRCA2-N372HLowUncertainUncertain pathogenic

Recessive, Carrier (Heterozygous)
0.23656This is a common variant of BRCA2 (HapMap allele frequency of 23%). The variant is weakly associated with an increased chance of breast cancer, and zygosity of the variant is associated with sex of children: male children are more likely to be homozygous for this variant, female children are more likely to be heterozygous.1
13OCA2-A481TLowUncertainUncertain pathogenic

Recessive, Carrier (Heterozygous)
0.00148726This variant is associated with lower melanin production and may result in less pigmentation in skin or eyes. The variant is suggested to play a role in oculocutaneous albinism when combined with more severe variants, but these findings lack statistical significance.1
14IL7R-T244ILowLikelyLikely protective

Unknown, Heterozygous
0.210169The reference genome variant for this allele has been associated with a slight increased risk of multiple sclerosis. Thus, this variant can be treated as a "protective" variant -- carriers of this variant are slightly less likely to have MS. Because the disease is rare and the effect of this variant is not very strong, the absolute decreased risk for carriers of this variant is less than .05% (less than 1 in 2000).1
15ABCG5-R50CLowLikelyLikely protective

Unknown, Heterozygous
0.0684142This variant has a mild protective effect on blood cholesterol. It is associated with slightly lower total and LDL cholesterol levels.1
16KCNJ11-K23ELowLikelyLikely protective

Unknown, Homozygous
0.738148This variant is associated with decreased risk of type 2 diabetes. It is unclear whether this variant has additive effects, or acts in a dominant or recessive manner. Assuming diabetes has a lifetime risk of 36%, we estimate a decreased risk of around 1-2% per copy of this variant.1
17TGFB1-T263ILowUncertainUncertain protective

Dominant, Heterozygous
0.0205429Carriers may be less likely to have cleft lip and palate congenital deformity.1
18MTR-D919GLowUncertainUncertain protective

Complex/Other, Heterozygous
0.217234This variant was weakly associated with a protective effect vs. colorectal cancer, but only in individuals with low alcohol consumption. 1
19LPL-S474XLowUncertainUncertain protective

Unknown, Heterozygous
0.0844953This variant actually increases LPL enzyme activity despite creating a termination codon (see Rip J et al). It appears to be a protective variant, associated with lower triglyceride levels--although the effect is quite weak and explains only 0.5-1% of triglyceride variation.1
20ADA-D8NLowLikelyLikely benign

Dominant, Heterozygous
0.0295359This common variant is reported to reduce adenosine deaminase enzyme activity. It has been associated with an increased tendency for non-REM sleep -- more slow wave sleep, less nocturnal wakings, and a stronger negative impact of sleep deprivation. A role for this gene and variant was previously proposed for autism susceptibility, but this is controversial and was not replicated by later studies.1
21EFHC1-R182HLowLikelyLikely benign

Unknown, Heterozygous
0.0439673Probably benign. OMIM appears to incorrectly interpret literature as linking this variant to juvenile myoclonic epilepsy; the authors report it as a polymorphism.1
22PMS2-P470SLowLikelyLikely benign

Unknown, Heterozygous
0.374884Benign, common variant.1
23ADA-K80RLowLikelyLikely benign

Recessive, Carrier (Heterozygous)
0.0635806This variant has a 3.5% allele frequency in 1000 genomes data. Although OMIM links this to disease, the paper they reference uses in vitro data to conclude that this is a functionally neutral polymorphism.1
24FBN2-S2580LLowUncertainUncertain benign

Dominant, Heterozygous
0.0779885Probably benign -- initially associated with congenital contractual arachnodactyly, but later reports classify it as a nonpathogenic polymorphism.1
25MLH1-I219VLowUncertainUncertain benign

Dominant, Heterozygous
0.239822Computational evidence, functional assays, and case/control studies suggest this variant is probably benign.1
26ALOX12B-P127SLowUncertainUncertain benign

Complex/Other, Heterozygous
0.0167317This variant was found heterozygously in autosomal recessive congenital ichthyosis in two Turkish siblings, although the second mutation was not found. Later, Lesueur et al. observe that this variant has a 4% frequency in their North African controls and is likely just a rare SNP.1
27ABCC11-G180RLowUncertainUncertain benign

Unknown, Heterozygous
0.0976947This variant is associated with dry type ear wax (a benign trait) in a recessive manner.1
28CYP27A1-P384LLowUncertainUncertain benign

Unknown, Heterozygous
0.0177542Probably not pathogenic. Although predicted to be disruptive and treated by some as pathogenic, reports of this variant in cases were all linked with an upstream frameshift variant -- this supports the variant as a nonpathogenic ancestral polymorphism.1
29APOB-Y1422CLowUncertainUncertain benign

Unknown, Homozygous
0.999628This position is almost certainly an error in the HG18 reference sequence. 1
30MUSK-T100MLowUncertainUncertain benign

Unknown, Heterozygous
0.023413Probably benign.1
31UNC13D-A59TLowUncertainUncertain benign

Unknown, Heterozygous
0.0171965Probably benign. This variant was reported to cause haemophagocytic lymphohistiocytosis in a recessive manner, but its allele frequency is inconsistent with this hypothesis and so we evaluate it as a nonpathogenic polymorphism.1
32TAS2R38-I296VLowUncertainUncertain benign

Unknown, Heterozygous
0.463376This variant is associated with "taster" status of PTC, along with 49P and 262A. Due to linkage disequilibrium, the independent effects of positions 296 and 262 is unclear. The presence of 49P confers taster status in a dominant fashion, but in the absence of 49P, the presence of 262A/296V is still positively associated with tasting PTC.1
33PTCH1-P1315LLowUncertainUncertain benign

Unknown, Heterozygous
0.29631Common polymorphism, presumed benign.1
34SLC45A2-L374FLowUncertainUncertain benign

Unknown, Homozygous
0.691764Pigmentation allele for non-black hair, and consequently, possible increased susceptibility to malignant melanoma.1
35TAS2R38-A49PLowUncertainUncertain benign

Unknown, Heterozygous
0.431121This variant is strongly associated with causing the "taster" phenotype of phenylthiocarbamine (PTC) in a dominant manner.1
36TCIRG1-R56WLowUncertainUncertain benign

Unknown, Heterozygous
0.0441778Probably benign. One publication implicates the variant in causing osteopetrosis, but this is contradicted by the relatively high allele frequency for the variant in Caucasians (5%, 1 in 400 homozygous) while that disease is extremely rare (1 in 250,000).1
37TYR-S192YLowUncertainUncertain benign

Unknown, Homozygous
0.270682This variant is reported to affect skin pigmentation. It is associated with lighter skin in South Asians (OR 4-5) and with a lack of freckles in Europeans (OR 1.3).1
38PCSK9-G670ELowUncertainUncertain benign

Unknown, Homozygous
0.888269This variant is likely benign. 1
39RP1-N985YLowUncertainUncertain benign

Unknown, Heterozygous
0.348671Probably benign. One report linked this variant to high triglycerides, but a later paper found a nearby SNP with similar association and suggests that both findings are caused by linkage to an undiscovered causal variant.1
VariantPrioritization scoreAllele
freq
Num of
articles
Zygosity and Prioritization Score Reasons

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