Genetic Variant CYC1:c.129+19C>T (chr8-144095247-C-T) – ACMG Classification: Likely_benign (-4 pts)

Variant summary

Our verdict is Likely benign. The variant received -4 ACMG points: 2P and 6B. PM2BP4_StrongBP6_Moderate

The NM_001916.5(CYC1):c.129+19C>T variant causes a intron change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0000342 in 1,197,604 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Likely benign (★).

Frequency

Genomes: 𝑓 0.000033 ( 0 hom., cov: 32)

Exomes 𝑓: 0.000034 ( 0 hom. )

Consequence

CYC1
NM_001916.5 intron

Scores

Clinical Significance

Likely benign criteria provided, single submitter B:1

Conservation

PhyloP100: -1.54

Publications

0 publications found

Variant links:

Genes affected

CYC1 (HGNC:2579): (cytochrome c1) This gene encodes a subunit of the cytochrome bc1 complex, which plays an important role in the mitochondrial respiratory chain by transferring electrons from the Rieske iron-sulfur protein to cytochrome c. Mutations in this gene may cause mitochondrial complex III deficiency, nuclear type 6. [provided by RefSeq, Dec 2013]

CYC1 Gene-Disease associations (from GenCC):

mitochondrial complex III deficiency nuclear type 6
Inheritance: AR, Unknown Classification: DEFINITIVE, LIMITED Submitted by: G2P, Labcorp Genetics (formerly Invitae)
mitochondrial disease
Inheritance: AR Classification: MODERATE Submitted by: ClinGen
mitochondrial complex III deficiency
Inheritance: AR Classification: SUPPORTIVE Submitted by: Orphanet

CYC1 links:

Genome browser will be placed here

ACMG classification

Classification was made for transcript

Our verdict: Likely_benign. The variant received -4 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

BP4

Computational evidence support a benign effect (BayesDel_noAF=-0.87).

BP6

Variant 8-144095247-C-T is Benign according to our data. Variant chr8-144095247-C-T is described in ClinVar as Likely_benign. ClinVar VariationId is 2973130.Status of the report is criteria_provided_single_submitter, 1 stars.

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_001916.5. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	CYC1	NM_001916.5	MANE Select	c.129+19C>T		intron	N/A	NP_001907.3

Ensembl Transcripts

Gene	Transcript	Tags	HGVSc	Effect	Exon Rank	Protein	UniProt
CYC1	ENST00000318911.5	TSL:1 MANE Select	c.129+19C>T	intron	N/A	ENSP00000317159.4	P08574
CYC1	ENST00000533444.1	TSL:1	n.209C>T	non_coding_transcript_exon	Exon 1 of 6
CYC1	ENST00000876792.1		c.129+19C>T	intron	N/A	ENSP00000546851.1

Frequencies

GnomAD3 genomes

AF:

0.0000329

AC:

AN:

151868

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.0000241

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.0000655

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.00

Gnomad SAS

AF:

0.00

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.0000442

Gnomad OTH

AF:

0.00

GnomAD4 exome

AF:

0.0000344

AC:

AN:

1045736

Hom.:

Cov.:

AF XY:

0.0000446

AC XY:

AN XY:

493134

show subpopulations

African (AFR)

AF:

0.00

AC:

AN:

21724

American (AMR)

AF:

0.000139

AC:

AN:

7202

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

12618

East Asian (EAS)

AF:

0.0000863

AC:

AN:

23186

South Asian (SAS)

AF:

0.00

AC:

AN:

18994

European-Finnish (FIN)

AF:

0.00

AC:

AN:

20158

Middle Eastern (MID)

AF:

0.00

AC:

AN:

2742

European-Non Finnish (NFE)

AF:

0.0000367

AC:

AN:

898056

Other (OTH)

AF:

0.00

AC:

AN:

41056

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.507

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Exome 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

GnomAD4 genome

AF:

0.0000329

AC:

AN:

151868

Hom.:

Cov.:

AF XY:

0.0000270

AC XY:

AN XY:

74188

show subpopulations

African (AFR)

AF:

0.0000241

AC:

AN:

41408

American (AMR)

AF:

0.0000655

AC:

AN:

15256

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

3472

East Asian (EAS)

AF:

0.00

AC:

AN:

5146

South Asian (SAS)

AF:

0.00

AC:

AN:

4830

European-Finnish (FIN)

AF:

0.00

AC:

AN:

10542

Middle Eastern (MID)

AF:

0.00

AC:

AN:

314

European-Non Finnish (NFE)

AF:

0.0000442

AC:

AN:

67898

Other (OTH)

AF:

0.00

AC:

AN:

2090

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.485

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:

0.0000712

Hom.:

Bravo

AF:

0.0000227

ClinVar

ClinVar submissions

Significance:Likely benign

Revision:criteria provided, single submitter

View on ClinVar

Pathogenic

VUS

Benign

Condition

not provided (1)

Computational scores

Source: dbNSFP v4.9

Name

Calibrated prediction

Score

Prediction

BayesDel_noAF

Benign

-0.87

CADD

Benign

6.6

(source)

DANN

Benign

0.86

PhyloP100

-1.5

PromoterAI

-0.058

Neutral

(source)

RBP_binding_hub_radar

0.0

RBP_regulation_power_radar

1.1

Splicing

Name

Calibrated prediction

Score

Prediction

SpliceAI score (max)

0.0

Details are displayed if max score is > 0.2

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