Genetic Variant C12orf57:c.-253G>T (chr12-6943869-G-T) – ACMG Classification: Benign (-12 pts)

Variant summary

Our verdict is Benign. The variant received -12 ACMG points: 0P and 12B. BP4_StrongBS1BS2

The NM_001301834.1(C12orf57):c.-16+207G>T variant causes a intron change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000869 in 953,470 control chromosomes in the GnomAD database, including 2 homozygotes. In-silico tool predicts a benign outcome for this variant. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar.

Frequency

Genomes: 𝑓 0.00053 ( 0 hom., cov: 34)

Exomes 𝑓: 0.00093 ( 2 hom. )

Consequence

C12orf57
NM_001301834.1 intron

Scores

Clinical Significance

Not reported in ClinVar

Conservation

PhyloP100: 2.96

Publications

1 publications found

Variant links:

Genes affected

C12orf57 (HGNC:29521): (chromosome 12 open reading frame 57) This gene is ubiquitously expressed in human tissues. It is required for development of the human corpus callosum. Mutations in this gene are associated with Temtamy syndrome (TEMTYS). Multiple alternatively spliced transcript variants have been found for this gene. [provided by RefSeq, Sep 2014]

C12orf57 links:

RNU7-1 (HGNC:34033): (RNA, U7 small nuclear 1) Implicated in Aicardi-Goutieres syndrome. [provided by Alliance of Genome Resources, Apr 2022]

RNU7-1 Gene-Disease associations (from GenCC):

Aicardi-Goutieres syndrome 9
Inheritance: AR Classification: STRONG, MODERATE Submitted by: Illumina, Labcorp Genetics (formerly Invitae), PanelApp Australia

RNU7-1 links:

ENSG00000272173 (HGNC:):

ENSG00000272173 links:

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ACMG classification

Classification was made for transcript

Our verdict: Benign. The variant received -12 ACMG points.

BP4

Computational evidence support a benign effect (BayesDel_noAF=-0.6).

BS1

Variant frequency is greater than expected in population nfe. GnomAdExome4 allele frequency = 0.000934 (748/801198) while in subpopulation NFE AF = 0.00118 (719/607936). AF 95% confidence interval is 0.00111. There are 2 homozygotes in GnomAdExome4. There are 383 alleles in the male GnomAdExome4 subpopulation. Median coverage is 10. This position passed quality control check.

BS2

High Homozygotes in GnomAdExome4 at 2 AR gene

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_001301834.1. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Gene	Transcript	HGVSc	Effect	Exon Rank	Protein	UniProt
C12orf57	NM_001301834.1	c.-16+207G>T	intron	N/A	NP_001288763.1	Q99622
C12orf57	NM_001301836.2	c.13+207G>T	intron	N/A	NP_001288765.1
RNU7-1	NR_023317.1	n.54G>T	non_coding_transcript_exon	Exon 1 of 1

Ensembl Transcripts

Gene	Transcript	Tags	HGVSc	Effect	Exon Rank	Protein	UniProt
C12orf57	ENST00000544681.1	TSL:2	c.-253G>T	5_prime_UTR	Exon 1 of 2	ENSP00000475422.1	U3KQ07
C12orf57	ENST00000537087.5	TSL:2	c.-253G>T	5_prime_UTR	Exon 1 of 3	ENSP00000440937.1	F5GXW5
C12orf57	ENST00000921170.1		c.-253G>T	5_prime_UTR	Exon 1 of 2	ENSP00000591229.1

Frequencies

GnomAD3 genomes

AF:

0.000532

AC:

AN:

152154

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.000217

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.00

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.00

Gnomad SAS

AF:

0.00

Gnomad FIN

AF:

0.000377

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.00100

Gnomad OTH

AF:

0.00

GnomAD4 exome

AF:

0.000934

AC:

748

AN:

801198

Hom.:

Cov.:

AF XY:

0.000954

AC XY:

383

AN XY:

401514

show subpopulations

African (AFR)

AF:

0.000334

AC:

AN:

17956

American (AMR)

AF:

0.000116

AC:

AN:

17206

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

14748

East Asian (EAS)

AF:

0.00

AC:

AN:

28466

South Asian (SAS)

AF:

0.0000190

AC:

AN:

52702

European-Finnish (FIN)

AF:

0.000171

AC:

AN:

23408

Middle Eastern (MID)

AF:

0.00

AC:

AN:

2620

European-Non Finnish (NFE)

AF:

0.00118

AC:

719

AN:

607936

Other (OTH)

AF:

0.000443

AC:

AN:

36156

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.508

Heterozygous variant carriers

115

154

192

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Exome Het

Exome Hom

Variant carriers

104

130

<30

30-35

35-40

40-45

45-50

50-55

55-60

60-65

65-70

70-75

75-80

>80

Age

GnomAD4 genome

AF:

0.000532

AC:

AN:

152272

Hom.:

Cov.:

AF XY:

0.000484

AC XY:

AN XY:

74452

show subpopulations

African (AFR)

AF:

0.000216

AC:

AN:

41578

American (AMR)

AF:

0.00

AC:

AN:

15298

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

3472

East Asian (EAS)

AF:

0.00

AC:

AN:

5180

South Asian (SAS)

AF:

0.00

AC:

AN:

4818

European-Finnish (FIN)

AF:

0.000377

AC:

AN:

10606

Middle Eastern (MID)

AF:

0.00

AC:

AN:

294

European-Non Finnish (NFE)

AF:

0.00100

AC:

AN:

68002

Other (OTH)

AF:

0.00

AC:

AN:

2112

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.510

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Genome Het

Variant carriers

<30

30-35

35-40

40-45

45-50

50-55

55-60

60-65

65-70

70-75

75-80

>80

Age

Alfa

AF:

0.00

Hom.:

Bravo

AF:

0.000510

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.9

Name

Calibrated prediction

Score

Prediction

BayesDel_noAF

Benign

-0.60

CADD

Benign

(source)

DANN

Benign

0.60

PhyloP100

3.0

PromoterAI

-0.0056

Neutral

(source)

RBP_binding_hub_radar

1.1

RBP_regulation_power_radar

2.3

Mutation Taster

=300/0

polymorphism

(source)

Splicing

Find out detailed SpliceAI scores and Pangolin per-transcript scores at spliceailookup.broadinstitute.org

Publications

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Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

Publications

ACMG classification

Variant Effect in Transcripts

RefSeq Transcripts

Ensembl Transcripts

Frequencies

Age Distribution

Age Distribution

ClinVar

Computational scores

Splicing

Publications

Other links and lift over