NM_006614.4:c.223C>G

Variant names:

• chr3-328192-C-G
• rs954598804
• NM_006614.4:c.223C>G

Variant summary

Our verdict is Uncertain significance. The variant received 0 ACMG points: 2P and 2B. PM2 BP4_Moderate

The NM_006614.4(CHL1):​c.223C>G​(p.Pro75Ala) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000000689 in 1,452,098 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 14/21 in silico tools predict a benign outcome for this variant. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar. Another variant affecting the same amino acid position, but resulting in a different missense (i.e. P75T) has been classified as Uncertain significance.

• Frequency:
  • Genomes: not found (cov: 32)
  • Exomes 𝑓: 6.9e-7 (0 hom.)
• Consequence: CHL1 NM_006614.4 missense
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 1.44
• Publications: 2 publications found

Genes affected

CHL1 (HGNC:1939): (cell adhesion molecule L1 like) The protein encoded by this gene is a member of the L1 gene family of neural cell adhesion molecules. It is a neural recognition molecule that may be involved in signal transduction pathways. The deletion of one copy of this gene may be responsible for mental defects in patients with 3p- syndrome. This protein may also play a role in the growth of certain cancers. Alternate splicing results in both coding and non-coding variants. [provided by RefSeq, Nov 2011]

CHL1 Gene-Disease associations (from GenCC):

• neurodevelopmental disorder

  Inheritance: AD Classification: LIMITED Submitted by: Ambry Genetics
• partial deletion of the short arm of chromosome 3

  Inheritance: AD Classification: LIMITED Submitted by: Ambry Genetics

ACMG classification

Our verdict: Uncertain_significance. The variant received 0 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (MetaRNN=0.21580288).

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_006614.4. 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
	CHL1	NM_006614.4	MANE Select	c.223C>G	p.Pro75Ala	missense	Exon 5 of 28	NP_006605.2
	CHL1	NM_001253387.2		c.223C>G	p.Pro75Ala	missense	Exon 5 of 27	NP_001240316.1	O00533-1
	CHL1	NM_001253388.1		c.223C>G	p.Pro75Ala	missense	Exon 3 of 25	NP_001240317.1	A0A087X0M8

Ensembl Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	CHL1	ENST00000256509.7	TSL:1 MANE Select	c.223C>G	p.Pro75Ala	missense	Exon 5 of 28	ENSP00000256509.2	O00533-2
	CHL1	ENST00000397491.6	TSL:1	c.223C>G	p.Pro75Ala	missense	Exon 5 of 27	ENSP00000380628.2	O00533-1
	CHL1	ENST00000620033.4	TSL:1	c.223C>G	p.Pro75Ala	missense	Exon 3 of 25	ENSP00000483512.1	A0A087X0M8

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome AF: 6.89e-7 AC: 1 AN: 1452098 Hom.: 0 Cov.: 30 AF XY: 0.00 AC XY: 0 AN XY: 722298

African (AFR) AF: 0.00 AC: 0 AN: 33022

American (AMR) AF: 0.00 AC: 0 AN: 43796

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 25778

East Asian (EAS) AF: 0.00 AC: 0 AN: 39396

South Asian (SAS) AF: 0.00 AC: 0 AN: 84458

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 53168

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 5734

European-Non Finnish (NFE) AF: 9.04e-7 AC: 1 AN: 1106786

Other (OTH) AF: 0.00 AC: 0 AN: 59960

GnomAD4 genome Cov.: 32

Alfa AF: 0.00 Hom.: 0

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.13
BayesDel_addAF	Uncertain	0.085	D
BayesDel_noAF	Benign	-0.12
CADD	Benign	13
DANN	Benign	0.81
DEOGEN2	Benign	0.059	T
Eigen	Benign	-0.44
Eigen_PC	Benign	-0.36
FATHMM_MKL	Benign	0.74	D
LIST_S2	Benign	0.62	T
M_CAP	Pathogenic	0.29	D
MetaRNN	Benign	0.22	T
MetaSVM	Uncertain	0.47	D
PhyloP100		1.4
PrimateAI	Benign	0.24	T
PROVEAN	Benign	-0.92	N
REVEL	Benign	0.12
Sift	Benign	0.20	T
Sift4G	Benign	0.53	T
Polyphen		0.014	B
Vest4		0.34
MutPred		0.48		Gain of glycosylation at T70 (P = 0.0364)
MVP		0.59
MPC		0.021
ClinPred		0.17	T
GERP RS		3.0
Varity_R		0.040
gMVP		0.46
Mutation Taster		=78/22	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: rs954598804; hg19: chr3-369875;