2-121530831-C-G

Variant names:

• chr2-121530831-C-G
• rs72969386
• NM_001395891.1:c.196-506G>C

Variant summary

Our verdict is Benign. The variant received -20 ACMG points: 0P and 20B. BP4_Strong BP6_Very_Strong BA1

The NM_001395891.1(CLASP1):​c.196-506G>C variant causes a intron change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0454 in 661,218 control chromosomes in the GnomAD database, including 897 homozygotes. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Benign (★★).

• Frequency:
  • Genomes: 𝑓 0.038 (157 hom., cov: 32)
  • Exomes 𝑓: 0.048 (740 hom.)
• Consequence: CLASP1 NM_001395891.1 intron
• Clinical Significance: Benign criteria provided, multiple submitters, no conflicts B:2
• Conservation: PhyloP100: -4.26
• Publications: 4 publications found

Genes affected

CLASP1 (HGNC:17088): (cytoplasmic linker associated protein 1) CLASPs, such as CLASP1, are nonmotor microtubule-associated proteins that interact with CLIPs (e.g., CLIP170; MIM 179838). CLASP1 is involved in the regulation of microtubule dynamics at the kinetochore and throughout the spindle (Maiato et al., 2003 [PubMed 12837247]).[supplied by OMIM, Mar 2008]

CLASP1-AS1 (HGNC:55328): (CLASP1 antisense RNA 1)

RNU4ATAC (HGNC:34016): (RNA, U4atac small nuclear) The small nuclear RNA (snRNA) encoded by this gene is part of the U12-dependent minor spliceosome complex. In addition to the encoded RNA, this ribonucleoprotein complex consists of U11, U12, U5, and U6atac snRNAs. The U12-dependent spliceosome acts on approximately 700 specific introns in the human genome. Defects in this gene are a cause of microcephalic osteodysplastic primordial dwarfism type 1 (MOPD). [provided by RefSeq, Jul 2011]

RNU4ATAC Gene-Disease associations (from GenCC):

• microcephalic osteodysplastic primordial dwarfism type I

  Inheritance: AR Classification: DEFINITIVE, STRONG, MODERATE Submitted by: Labcorp Genetics (formerly Invitae), Ambry Genetics, G2P
• RNU4ATAC spectrum disorder

  Inheritance: AR Classification: DEFINITIVE, STRONG, MODERATE Submitted by: Broad Center for Mendelian Genomics, Ambry Genetics, ClinGen
• Roifman syndrome

  Inheritance: AR Classification: DEFINITIVE, STRONG, MODERATE Submitted by: Labcorp Genetics (formerly Invitae), Ambry Genetics, Illumina
• Lowry-Wood syndrome

  Inheritance: AR Classification: LIMITED Submitted by: Ambry Genetics

ACMG classification

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

• BP4: Computational evidence support a benign effect (BayesDel_noAF=-0.83).
• BP6: Variant 2-121530831-C-G is Benign according to our data. Variant chr2-121530831-C-G is described in ClinVar as Benign. ClinVar VariationId is 1236574.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars.
• BA1: GnomAd4 highest subpopulation (EAS) allele frequency at 95% confidence interval = 0.13 is higher than 0.05.

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_001395891.1. 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
	CLASP1	NM_001395891.1	MANE Select	c.196-506G>C		intron	N/A	NP_001382820.1	A0A8V8TLP7
	CLASP1	NM_015282.3		c.196-506G>C		intron	N/A	NP_056097.1	Q7Z460-1
	CLASP1	NM_001378003.1		c.196-506G>C		intron	N/A	NP_001364932.1

Ensembl Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	CLASP1	ENST00000696935.1	MANE Select	c.196-506G>C		intron	N/A	ENSP00000512981.1	A0A8V8TLP7
	CLASP1	ENST00000263710.8	TSL:5	c.196-506G>C		intron	N/A	ENSP00000263710.4	Q7Z460-1
	CLASP1	ENST00000961911.1		c.196-506G>C		intron	N/A	ENSP00000631970.1

Frequencies

GnomAD3 genomes AF: 0.0384 AC: 5841 AN: 152176 Hom.: 156 Cov.: 32

Gnomad AFR AF: 0.0195

Gnomad AMI AF: 0.0526

Gnomad AMR AF: 0.0381

Gnomad ASJ AF: 0.0628

Gnomad EAS AF: 0.139

Gnomad SAS AF: 0.0542

Gnomad FIN AF: 0.0248

Gnomad MID AF: 0.0285

Gnomad NFE AF: 0.0421

Gnomad OTH AF: 0.0311

GnomAD2 exomes AF: 0.0518 AC: 6180 AN: 119218 AF XY: 0.0510

Gnomad AFR exome AF: 0.0160

Gnomad AMR exome AF: 0.0535

Gnomad ASJ exome AF: 0.0603

Gnomad EAS exome AF: 0.132

Gnomad FIN exome AF: 0.0269

Gnomad NFE exome AF: 0.0425

Gnomad OTH exome AF: 0.0496

GnomAD4 exome AF: 0.0476 AC: 24204 AN: 508924 Hom.: 740 Cov.: 0 AF XY: 0.0474 AC XY: 12884 AN XY: 271626

African (AFR) AF: 0.0189 AC: 273 AN: 14420

American (AMR) AF: 0.0520 AC: 1611 AN: 31010

Ashkenazi Jewish (ASJ) AF: 0.0569 AC: 1069 AN: 18782

East Asian (EAS) AF: 0.115 AC: 3617 AN: 31362

South Asian (SAS) AF: 0.0478 AC: 2849 AN: 59576

European-Finnish (FIN) AF: 0.0287 AC: 932 AN: 32500

Middle Eastern (MID) AF: 0.0254 AC: 58 AN: 2286

European-Non Finnish (NFE) AF: 0.0429 AC: 12481 AN: 290640

Other (OTH) AF: 0.0464 AC: 1314 AN: 28348

GnomAD4 genome AF: 0.0384 AC: 5845 AN: 152294 Hom.: 157 Cov.: 32 AF XY: 0.0376 AC XY: 2801 AN XY: 74456

African (AFR) AF: 0.0196 AC: 815 AN: 41570

American (AMR) AF: 0.0383 AC: 586 AN: 15304

Ashkenazi Jewish (ASJ) AF: 0.0628 AC: 218 AN: 3472

East Asian (EAS) AF: 0.139 AC: 715 AN: 5154

South Asian (SAS) AF: 0.0539 AC: 260 AN: 4826

European-Finnish (FIN) AF: 0.0248 AC: 263 AN: 10618

Middle Eastern (MID) AF: 0.0306 AC: 9 AN: 294

European-Non Finnish (NFE) AF: 0.0421 AC: 2866 AN: 68030

Other (OTH) AF: 0.0307 AC: 65 AN: 2114

Alfa AF: 0.0399 Hom.: 27

Bravo AF: 0.0400

Asia WGS AF: 0.0670 AC: 235 AN: 3478

ClinVar

ClinVar submissions as Germline

Significance: Benign

Revision: criteria provided, multiple submitters, no conflicts

Pathogenic	VUS	Benign	Condition
-	-	2	not provided (2)

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.83
CADD	Benign	0.016
DANN	Benign	0.48
PhyloP100		-4.3
Mutation Taster		=100/0	polymorphism (auto)

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.090		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: rs72969386; hg19: chr2-122288407;