Genetic Variant SYNM:p.Gly51Gly (chr15-99105352-C-T) – ACMG Classification: Likely_benign (-3 pts)

Variant summary

Our verdict is Likely benign. The variant received -3 ACMG points: 2P and 5B. PM2BP4_StrongBP7

The NM_145728.3(SYNM):c.153C>T(p.Gly51Gly) variant causes a synonymous change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0000026 in 1,535,938 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar. Synonymous variant affecting the same amino acid position (i.e. G51G) has been classified as Likely benign.

Frequency

Genomes: 𝑓 0.000013 ( 0 hom., cov: 32)

Exomes 𝑓: 0.0000014 ( 0 hom. )

Consequence

SYNM
NM_145728.3 synonymous

Scores

Clinical Significance

Not reported in ClinVar

Conservation

PhyloP100: 0.582

Publications

1 publications found

Variant links:

Genes affected

SYNM (HGNC:24466): (synemin) The protein encoded by this gene is an intermediate filament (IF) family member. IF proteins are cytoskeletal proteins that confer resistance to mechanical stress and are encoded by a dispersed multigene family. This protein has been found to form a linkage between desmin, which is a subunit of the IF network, and the extracellular matrix, and provides an important structural support in muscle. Two alternatively spliced variants encoding different isoforms have been described for this gene. [provided by RefSeq, Jul 2008]

SYNM links:

SYNM-AS1 (HGNC:55421): (SYNM antisense RNA 1)

SYNM-AS1 links:

Genome browser will be placed here

ACMG classification

Classification was made for transcript

Our verdict: Likely_benign. The variant received -3 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

BP4

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

BP7

Synonymous conserved (PhyloP=0.582 with no splicing effect.

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_145728.3. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
SYNM	NM_145728.3	MANE Select	c.153C>T	p.Gly51Gly	synonymous	Exon 1 of 4	NP_663780.2	O15061-1
SYNM	NM_015286.6		c.153C>T	p.Gly51Gly	synonymous	Exon 1 of 5	NP_056101.5
SYNM-AS1	NR_187219.1		n.190+336G>A		intron	N/A

Ensembl Transcripts

Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
SYNM	ENST00000336292.11	TSL:1 MANE Select	c.153C>T	p.Gly51Gly	synonymous	Exon 1 of 4	ENSP00000336775.7	O15061-1
SYNM	ENST00000594047.2	TSL:1	c.153C>T	p.Gly51Gly	synonymous	Exon 1 of 5	ENSP00000472953.1	O15061-2
SYNM	ENST00000328642.11	TSL:1	c.153C>T	p.Gly51Gly	synonymous	Exon 1 of 4	ENSP00000330469.8	O15061-3

Frequencies

GnomAD3 genomes

AF:

0.0000132

AC:

AN:

151958

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.0000483

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:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.00

Gnomad OTH

AF:

0.00

GnomAD2 exomes

AF:

0.00

AC:

AN:

134140

AF XY:

0.00

Gnomad AFR exome

AF:

0.00

Gnomad AMR exome

AF:

0.00

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.00

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.00000145

AC:

AN:

1383980

Hom.:

Cov.:

AF XY:

0.00000146

AC XY:

AN XY:

682926

show subpopulations

African (AFR)

AF:

0.0000652

AC:

AN:

30698

American (AMR)

AF:

0.00

AC:

AN:

35506

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

25008

East Asian (EAS)

AF:

0.00

AC:

AN:

35440

South Asian (SAS)

AF:

0.00

AC:

AN:

78798

European-Finnish (FIN)

AF:

0.00

AC:

AN:

39622

Middle Eastern (MID)

AF:

0.00

AC:

AN:

4688

European-Non Finnish (NFE)

AF:

0.00

AC:

AN:

1076636

Other (OTH)

AF:

0.00

AC:

AN:

57584

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.525

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

GnomAD4 genome

AF:

0.0000132

AC:

AN:

151958

Hom.:

Cov.:

AF XY:

0.0000135

AC XY:

AN XY:

74234

show subpopulations

African (AFR)

AF:

0.0000483

AC:

AN:

41402

American (AMR)

AF:

0.00

AC:

AN:

15270

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

3470

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:

10564

Middle Eastern (MID)

AF:

0.00

AC:

AN:

312

European-Non Finnish (NFE)

AF:

0.00

AC:

AN:

67960

Other (OTH)

AF:

0.00

AC:

AN:

2092

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.475

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:

0.00000378

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

0.96

PhyloP100

0.58

PromoterAI

-0.25

Neutral

(source)

RBP_binding_hub_radar

0.0

RBP_regulation_power_radar

1.0

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

ClinVar

Computational scores

Splicing

Publications

Other links and lift over