chr1-37557735-A-G

Variant names:

• chr1-37557735-A-G
• rs1643389837
• NM_003462.5:c.214A>G

Variant summary

Our verdict is Uncertain significance. Variant got 1 ACMG points: 2P and 1B. PM2 BP4

The NM_003462.5(DNALI1):​c.214A>G​(p.Ile72Val) variant causes a missense change. The variant allele was found at a frequency of 0.000000684 in 1,461,518 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. I72M) has been classified as Uncertain significance.

• Frequency:
  • Genomes: not found (cov: 32)
  • Exomes 𝑓: 6.8e-7 (0 hom.)
• Consequence: DNALI1 NM_003462.5 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 7.02

Genes affected

DNALI1 (HGNC:14353): (dynein axonemal light intermediate chain 1) This gene is the human homolog of the Chlamydomonas inner dynein arm gene, p28. The precise function of this gene is not known, however, it is a potential candidate for immotile cilia syndrome (ICS). Ultrastructural defects of the inner dynein arms are seen in patients with ICS. Immotile mutant strains of Chlamydomonas, a biflagellated algae, exhibit similar defects. [provided by RefSeq, Jul 2008]

ACMG classification

Verdict is Uncertain_significance. Variant got 1 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (MetaRNN=0.41103384).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
DNALI1	NM_003462.5	c.214A>G	p.Ile72Val	missense_variant	Exon 2 of 6	ENST00000652629.1	NP_003453.3

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
DNALI1	ENST00000652629.1	c.214A>G	p.Ile72Val	missense_variant	Exon 2 of 6		NM_003462.5	ENSP00000498620.1
DNALI1	ENST00000296218.8	c.280A>G	p.Ile94Val	missense_variant	Exon 2 of 6	1		ENSP00000296218.7
DNALI1	ENST00000466723.1	n.211A>G		non_coding_transcript_exon_variant	Exon 2 of 4	2
DNALI1	ENST00000490312.1	n.256A>G		non_coding_transcript_exon_variant	Exon 2 of 2	2

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome AF: 6.84e-7 AC: 1 AN: 1461518 Hom.: 0 Cov.: 32 AF XY: 0.00000138 AC XY: 1 AN XY: 727042

Gnomad4 AFR exome AF: 0.00

Gnomad4 AMR exome AF: 0.00

Gnomad4 ASJ exome AF: 0.00

Gnomad4 EAS exome AF: 0.00

Gnomad4 SAS exome AF: 0.0000116

Gnomad4 FIN exome AF: 0.00

Gnomad4 NFE exome AF: 0.00

Gnomad4 OTH exome AF: 0.00

GnomAD4 genome Cov.: 32

Bravo AF: 0.0000113

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

Submissions by phenotype

not specified Uncertain:1

Aug 10, 2024

Ambry Genetics

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

The c.280A>G (p.I94V) alteration is located in exon 2 (coding exon 2) of the DNALI1 gene. This alteration results from a A to G substitution at nucleotide position 280, causing the isoleucine (I) at amino acid position 94 to be replaced by a valine (V). Based on insufficient or conflicting evidence, the clinical significance of this alteration remains unclear. -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.27
BayesDel_addAF	Uncertain	0.033	T
BayesDel_noAF	Benign	-0.19
CADD	Uncertain	25
DANN	Uncertain	0.99
Eigen	Pathogenic	0.87
Eigen_PC	Pathogenic	0.79
FATHMM_MKL	Pathogenic	0.98	D
LIST_S2	Uncertain	0.94	D
M_CAP	Benign	0.023	T
MetaRNN	Benign	0.41	T
MetaSVM	Uncertain	0.21	D
PrimateAI	Uncertain	0.57	T
PROVEAN	Benign	-0.93	N
REVEL	Uncertain	0.39
Sift	Uncertain	0.015	D
Sift4G	Uncertain	0.0090	D
Vest4		0.51
MVP		0.33
MPC		0.23
ClinPred		0.97	D
GERP RS		5.5
gMVP		0.62

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.010		Details are displayed if max score is > 0.2

Find out detailed SpliceAI scores and Pangolin per-transcript scores at spliceailookup.broadinstitute.org

Publications

LitVar

Other links and lift over

dbSNP: rs1643389837; hg19: chr1-38023336;