dbSNP rs114380004: SPTLC1:c.985-5C>T (chr9-92047273-G-A) – ACMG Classification: Benign (-20 pts)

Variant summary

Our verdict is Benign. The variant received -20 ACMG points: 0P and 20B. BP4_StrongBP6_Very_StrongBS1BS2

The NM_006415.4(SPTLC1):c.985-5C>T variant causes a splice region, intron change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000399 in 1,612,192 control chromosomes in the GnomAD database, including 2 homozygotes. In-silico tool predicts a benign outcome for this variant. 3/3 splice prediction tools predict no significant impact on normal splicing. Variant has been reported in ClinVar as Likely benign (★★).

Frequency

Genomes: 𝑓 0.0023 ( 1 hom., cov: 32)

Exomes 𝑓: 0.00021 ( 1 hom. )

Consequence

SPTLC1
NM_006415.4 splice_region, intron

Scores

Splicing: ADA: 0.00003583

Clinical Significance

Benign/Likely benign criteria provided, multiple submitters, no conflicts B:5

Conservation

PhyloP100: 0.120

Publications

0 publications found

Variant links:

Genes affected

SPTLC1 (HGNC:11277): (serine palmitoyltransferase long chain base subunit 1) This gene encodes a member of the class-II pyridoxal-phosphate-dependent aminotransferase family. The encoded protein is the long chain base subunit 1 of serine palmitoyltransferase. Serine palmitoyltransferase converts L-serine and palmitoyl-CoA to 3-oxosphinganine with pyridoxal 5'-phosphate and is the key enzyme in sphingolipid biosynthesis. Mutations in this gene were identified in patients with hereditary sensory neuropathy type 1. Alternatively spliced variants encoding different isoforms have been identified. Pseudogenes of this gene have been defined on chromosomes 1, 6, 10, and 13. [provided by RefSeq, Jul 2013]

SPTLC1 Gene-Disease associations (from GenCC):

amyotrophic lateral sclerosis 27, juvenile
Inheritance: AD Classification: STRONG Submitted by: Ambry Genetics, Labcorp Genetics (formerly Invitae)
neuropathy, hereditary sensory and autonomic, type 1A
Inheritance: AD Classification: STRONG Submitted by: Labcorp Genetics (formerly Invitae)
hereditary sensory and autonomic neuropathy type 1
Inheritance: AD Classification: SUPPORTIVE Submitted by: Orphanet

SPTLC1 links:

Genome browser will be placed here

ACMG classification

Classification was made for transcript

Our verdict: Benign. The variant received -20 ACMG points.

BP4

Computational evidence support a benign effect (BayesDel_noAF=-0.83).

BP6

Variant 9-92047273-G-A is Benign according to our data. Variant chr9-92047273-G-A is described in ClinVar as Benign/Likely_benign. ClinVar VariationId is 367548.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars.

BS1

Variant frequency is greater than expected in population afr. GnomAd4 allele frequency = 0.00225 (342/151802) while in subpopulation AFR AF = 0.00784 (322/41064). AF 95% confidence interval is 0.00714. There are 1 homozygotes in GnomAd4. There are 158 alleles in the male GnomAd4 subpopulation. Median coverage is 32. This position passed quality control check.

BS2

High AC in GnomAd4 at 342 AD gene.

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_006415.4. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Gene	Transcript	Tags	HGVSc	Effect	Exon Rank	Protein
SPTLC1	NM_006415.4	MANE Select	c.985-5C>T	splice_region intron	N/A	NP_006406.1
SPTLC1	NM_001281303.2		c.985-5C>T	splice_region intron	N/A	NP_001268232.1
SPTLC1	NM_001368272.1		c.619-5C>T	splice_region intron	N/A	NP_001355201.1

Ensembl Transcripts

Gene	Transcript	Tags	HGVSc	Effect	Exon Rank	Protein
SPTLC1	ENST00000262554.7	TSL:1 MANE Select	c.985-5C>T	splice_region intron	N/A	ENSP00000262554.2
SPTLC1	ENST00000953500.1		c.1195-5C>T	splice_region intron	N/A	ENSP00000623559.1
SPTLC1	ENST00000884978.1		c.985-5C>T	splice_region intron	N/A	ENSP00000555037.1

Frequencies

GnomAD3 genomes

AF:

0.00224

AC:

340

AN:

151684

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.00782

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.000721

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:

0.0000882

Gnomad OTH

AF:

0.00144

GnomAD2 exomes

AF:

0.000582

AC:

146

AN:

250972

AF XY:

0.000339

show subpopulations

Gnomad AFR exome

AF:

0.00764

Gnomad AMR exome

AF:

0.000492

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.0000353

Gnomad OTH exome

AF:

0.000163

GnomAD4 exome

AF:

0.000207

AC:

302

AN:

1460390

Hom.:

Cov.:

AF XY:

0.000167

AC XY:

121

AN XY:

726604

show subpopulations

African (AFR)

AF:

0.00664

AC:

220

AN:

33114

American (AMR)

AF:

0.000514

AC:

AN:

44704

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

26118

East Asian (EAS)

AF:

0.00

AC:

AN:

39692

South Asian (SAS)

AF:

0.0000116

AC:

AN:

86234

European-Finnish (FIN)

AF:

0.00

AC:

AN:

53404

Middle Eastern (MID)

AF:

0.000347

AC:

AN:

5764

European-Non Finnish (NFE)

AF:

0.0000216

AC:

AN:

1111036

Other (OTH)

AF:

0.000530

AC:

AN:

60324

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.494

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Exome Het

Exome Hom

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:

0.00225

AC:

342

AN:

151802

Hom.:

Cov.:

AF XY:

0.00213

AC XY:

158

AN XY:

74216

show subpopulations

African (AFR)

AF:

0.00784

AC:

322

AN:

41064

American (AMR)

AF:

0.000720

AC:

AN:

15286

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

3472

East Asian (EAS)

AF:

0.00

AC:

AN:

5190

South Asian (SAS)

AF:

0.00

AC:

AN:

4830

European-Finnish (FIN)

AF:

0.00

AC:

AN:

10616

Middle Eastern (MID)

AF:

0.00

AC:

AN:

294

European-Non Finnish (NFE)

AF:

0.0000882

AC:

AN:

68028

Other (OTH)

AF:

0.00142

AC:

AN:

2110

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.498

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Genome Het

Genome Hom

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:

0.00113

Hom.:

Bravo

AF:

0.00235

Asia WGS

AF:

0.000289

AC:

AN:

3478

EpiCase

AF:

0.000164

EpiControl

AF:

0.00

ClinVar

ClinVar submissions as Germline

Significance:Benign/Likely benign

Revision:criteria provided, multiple submitters, no conflicts

View on ClinVar

Pathogenic

VUS

Benign

Condition

Hereditary sensory and autonomic neuropathy type 1 (1)

Inborn genetic diseases (1)

Neuropathy, hereditary sensory and autonomic, type 1A (1)

not provided (1)

not specified (1)

Computational scores

Source: dbNSFP v4.9

Name

Calibrated prediction

Score

Prediction

BayesDel_noAF

Benign

-0.83

CADD

Benign

8.6

(source)

DANN

Benign

0.49

PhyloP100

0.12

Mutation Taster

=99/1

polymorphism

(source)

Splicing

Name

Calibrated prediction

Score

Prediction

dbscSNV1_ADA

Benign

0.000036

dbscSNV1_RF

Benign

0.010

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

You must be logged in to view publications. This limit was set because tens of millions (!) of queries from AI bots are generated daily.

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