2-209772126-C-T

Variant names:

• chr2-209772126-C-T
• rs1326613587
• NM_001371986.1:c.54C>T

Variant summary

Our verdict is Likely benign. The variant received -3 ACMG points: 2P and 5B. PM2 BP4_Moderate BP6_Moderate BP7

The NM_001371986.1(UNC80):​c.54C>T​(p.Ile18Ile) variant causes a synonymous change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00000323 in 1,548,668 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 0.000013 (0 hom., cov: 32)
  • Exomes 𝑓: 0.0000021 (0 hom.)
• Consequence: UNC80 NM_001371986.1 synonymous
• Clinical Significance: Likely benign criteria provided, single submitter B:1
• Conservation: PhyloP100: 1.42
• Publications: 0 publications found

Genes affected

UNC80 (HGNC:26582): (unc-80 homolog, NALCN channel complex subunit) The protein encoded by this gene is a component of a voltage-independent 'leak' ion-channel complex, in which it performs essential functions, such as serving as a bridge between two other components (sodium leak channel non-selective and UNC79) and as a scaffold for Src kinases. Leak channels play an importnat role in establishment and maintenance of resting membrane potentials in neurons. Mutations in this gene are associated with congenital infantile encephalopathy, intellectual disability and growth issues. [provided by RefSeq, Aug 2016]

UNC80 Gene-Disease associations (from GenCC):

• hypotonia, infantile, with psychomotor retardation and characteristic facies 2

  Inheritance: AR, AD Classification: DEFINITIVE, STRONG Submitted by: ClinGen, Labcorp Genetics (formerly Invitae), Illumina
• hypotonia, infantile, with psychomotor retardation and characteristic facies

  Inheritance: AR Classification: SUPPORTIVE Submitted by: Orphanet

ACMG classification

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=-0.33).
• BP6: Variant 2-209772126-C-T is Benign according to our data. Variant chr2-209772126-C-T is described in ClinVar as Likely_benign. ClinVar VariationId is 1630896.Status of the report is criteria_provided_single_submitter, 1 stars.
• BP7: Synonymous conserved (PhyloP=1.42 with no splicing effect.

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_001371986.1. 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
	UNC80	NM_001371986.1	MANE Select	c.54C>T	p.Ile18Ile	synonymous	Exon 1 of 65	NP_001358915.1	A0A669KBC5
	UNC80	NM_032504.2		c.54C>T	p.Ile18Ile	synonymous	Exon 1 of 64	NP_115893.1	Q8N2C7-1
	UNC80	NM_182587.4		c.54C>T	p.Ile18Ile	synonymous	Exon 1 of 63	NP_872393.3	Q8N2C7-7

Ensembl Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	UNC80	ENST00000673920.1	MANE Select	c.54C>T	p.Ile18Ile	synonymous	Exon 1 of 65	ENSP00000501211.1	A0A669KBC5
	UNC80	ENST00000478701.1	TSL:1	n.134C>T		non_coding_transcript_exon	Exon 1 of 8
	UNC80	ENST00000439458.5	TSL:5	c.54C>T	p.Ile18Ile	synonymous	Exon 1 of 64	ENSP00000391088.1	Q8N2C7-1

Frequencies

GnomAD3 genomes AF: 0.0000132 AC: 2 AN: 151848 Hom.: 0 Cov.: 32

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

GnomAD4 exome AF: 0.00000215 AC: 3 AN: 1396820 Hom.: 0 Cov.: 31 AF XY: 0.00000145 AC XY: 1 AN XY: 688992

African (AFR) AF: 0.0000318 AC: 1 AN: 31420

American (AMR) AF: 0.00 AC: 0 AN: 35664

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 25126

East Asian (EAS) AF: 0.00 AC: 0 AN: 35636

South Asian (SAS) AF: 0.00 AC: 0 AN: 79166

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 48676

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 5062

European-Non Finnish (NFE) AF: 9.27e-7 AC: 1 AN: 1078204

Other (OTH) AF: 0.0000173 AC: 1 AN: 57866

GnomAD4 genome AF: 0.0000132 AC: 2 AN: 151848 Hom.: 0 Cov.: 32 AF XY: 0.00 AC XY: 0 AN XY: 74126

African (AFR) AF: 0.0000483 AC: 2 AN: 41386

American (AMR) AF: 0.00 AC: 0 AN: 15248

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 3468

East Asian (EAS) AF: 0.00 AC: 0 AN: 5122

South Asian (SAS) AF: 0.00 AC: 0 AN: 4830

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 10560

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 312

European-Non Finnish (NFE) AF: 0.00 AC: 0 AN: 67932

Other (OTH) AF: 0.00 AC: 0 AN: 2080

Alfa AF: 0.00 Hom.: 0

Bravo AF: 0.00000756

ClinVar

ClinVar submissions

Significance: Likely benign

Revision: criteria provided, single submitter

Pathogenic	VUS	Benign	Condition
-	-	1	not provided (1)

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.33
CADD	Benign	13
DANN	Benign	0.92
PhyloP100		1.4
PromoterAI		0.079	Neutral
Mutation Taster		=97/3	polymorphism

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

Other links and lift over

dbSNP: rs1326613587; hg19: chr2-210636850; COSMIC: COSV106331675;