rs193920978

Variant names:

• chr22-24321444-G-A
• rs193920978
• NM_015330.6:c.464G>A

Your query was ambiguous. Multiple possible variants found:

• chr22-24321444-G-A
• chr22-24321444-G-T

Variant summary

Our verdict is Uncertain significance. The variant received 1 ACMG points: 2P and 1B. PM2 BP4

The NM_015330.6(SPECC1L):​c.464G>A​(p.Arg155His) variant causes a missense change. The variant allele was found at a frequency of 0.00000205 in 1,461,888 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 Uncertain significance (★). Another variant affecting the same amino acid position, but resulting in a different missense (i.e. R155L) has been classified as Uncertain significance.

• Frequency:
  • Genomes: not found (cov: 33)
  • Exomes 𝑓: 0.0000021 (0 hom.)
• Consequence: SPECC1L NM_015330.6 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 6.70
• Publications: 0 publications found

Genes affected

SPECC1L (HGNC:29022): (sperm antigen with calponin homology and coiled-coil domains 1 like) This gene encodes a coiled-coil domain containing protein. The encoded protein may play a critical role in actin-cytoskeletal reorganization during facial morphogenesis. Mutations in this gene are a cause of oblique facial clefting-1. Alternatively spliced transcript variants encoding multiple isoforms have been observed for this gene. A read-through transcript composed of SPECC1L (sperm antigen with calponin homology and coiled-coil domains 1-like) and the downstream ADORA2A (adenosine A2a receptor) gene sequence has been identified, but it is thought to be non-coding. [provided by RefSeq, Jun 2013]

SPECC1L-ADORA2A (HGNC:49185): (SPECC1L-ADORA2A readthrough (NMD candidate)) This locus represents naturally occurring readthrough transcription between the neighboring SPECC1L (sperm antigen with calponin homology and coiled-coil domains 1-like) and ADORA2A (adenosine A2a receptor) genes on chromosome 22. The readthrough transcript is a candidate for nonsense-mediated mRNA decay (NMD) and is unlikely to produce a protein product. [provided by RefSeq, Jun 2013]

ENSG00000299949 (HGNC:):

ACMG classification

Our verdict: Uncertain_significance. The variant received 1 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (MetaRNN=0.37012792).

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_015330.6. 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
	SPECC1L	NM_015330.6	MANE Select	c.464G>A	p.Arg155His	missense	Exon 5 of 17	NP_056145.5	Q69YQ0-1
	SPECC1L	NM_001145468.4		c.464G>A	p.Arg155His	missense	Exon 4 of 16	NP_001138940.4	Q69YQ0-1
	SPECC1L	NM_001254732.3		c.464G>A	p.Arg155His	missense	Exon 4 of 15	NP_001241661.3	Q69YQ0-2

Ensembl Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	SPECC1L	ENST00000314328.14	TSL:1 MANE Select	c.464G>A	p.Arg155His	missense	Exon 5 of 17	ENSP00000325785.8	Q69YQ0-1
	SPECC1L	ENST00000437398.5	TSL:1	c.464G>A	p.Arg155His	missense	Exon 4 of 16	ENSP00000393363.1	Q69YQ0-1
	SPECC1L-ADORA2A	ENST00000358654.2	TSL:2	n.464G>A		non_coding_transcript_exon	Exon 5 of 20	ENSP00000351480.2	F8WAN1

Frequencies

GnomAD3 genomes Cov.: 33

GnomAD4 exome AF: 0.00000205 AC: 3 AN: 1461888 Hom.: 0 Cov.: 32 AF XY: 0.00000138 AC XY: 1 AN XY: 727246

African (AFR) AF: 0.00 AC: 0 AN: 33480

American (AMR) AF: 0.00 AC: 0 AN: 44724

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 26136

East Asian (EAS) AF: 0.0000252 AC: 1 AN: 39700

South Asian (SAS) AF: 0.00 AC: 0 AN: 86258

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 53416

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 5768

European-Non Finnish (NFE) AF: 0.00000180 AC: 2 AN: 1112010

Other (OTH) AF: 0.00 AC: 0 AN: 60396

GnomAD4 genome Cov.: 33

Alfa AF: 0.0000282 Hom.: 0

Bravo AF: 0.00000378

ClinVar

ClinVar submissions

Significance: Uncertain significance

Revision: criteria provided, single submitter

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

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.11
BayesDel_addAF	Uncertain	0.088	D
BayesDel_noAF	Benign	-0.11
CADD	Uncertain	24
DANN	Pathogenic	1.0
Eigen	Uncertain	0.54
Eigen_PC	Uncertain	0.53
FATHMM_MKL	Pathogenic	0.99	D
LIST_S2	Uncertain	0.87	D
M_CAP	Benign	0.036	D
MetaRNN	Benign	0.37	T
MetaSVM	Uncertain	-0.068	T
PhyloP100		6.7
PrimateAI	Uncertain	0.62	T
PROVEAN	Benign	-1.3	N
REVEL	Benign	0.18
Sift	Benign	0.10	T
Sift4G	Benign	0.072	T
Vest4		0.23
MutPred		0.18		Gain of ubiquitination at K152 (P = 0.052)
MVP		0.61
MPC		1.3
ClinPred		0.93	D
GERP RS		4.7
RBP_binding_hub_radar		0.0
RBP_regulation_power_radar		1.1
gMVP		0.35
Mutation Taster		=68/32	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: rs193920978; hg19: chr22-24717412;