rs796052121

Variant names:

• chr2-15394320-A-G
• rs796052121
• NM_015909.4:c.3164T>C

Variant summary

Our verdict is Uncertain significance. The variant received 4 ACMG points: 4P and 0B. PM2 PP5_Moderate

The NM_015909.4(NBAS):​c.3164T>C​(p.Leu1055Pro) variant causes a missense change involving the alteration of a conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. Variant has been reported in ClinVar as Likely pathogenic (★). Another variant affecting the same amino acid position, but resulting in a different missense (i.e. L1055F) has been classified as Uncertain significance.

• Frequency: Genomes: not found (cov: 32)
• Consequence: NBAS NM_015909.4 missense
• Clinical Significance: Likely pathogenic criteria provided, single submitter P:2
• Conservation: PhyloP100: 8.48
• Publications: 6 publications found

Genes affected

NBAS (HGNC:15625): (NBAS subunit of NRZ tethering complex) This gene encodes a protein with two leucine zipper domains, a ribosomal protein S14 signature domain and a Sec39 like domain. The protein is thought to be involved in Golgi-to-ER transport. Mutations in this gene are associated with short stature, optic nerve atrophy, and Pelger-Huet anomaly. [provided by RefSeq, Oct 2012]

NBAS Gene-Disease associations (from GenCC):

• infantile liver failure syndrome 2

  Inheritance: AR Classification: DEFINITIVE, STRONG, SUPPORTIVE Submitted by: Orphanet, Labcorp Genetics (formerly Invitae), G2P
• short stature-optic atrophy-Pelger-Huët anomaly syndrome

  Inheritance: AR Classification: DEFINITIVE, STRONG, SUPPORTIVE Submitted by: Orphanet, Illumina, Labcorp Genetics (formerly Invitae), G2P

ACMG classification

Our verdict: Uncertain_significance. The variant received 4 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• PP5: Variant 2-15394320-A-G is Pathogenic according to our data. Variant chr2-15394320-A-G is described in ClinVar as Likely_pathogenic. ClinVar VariationId is 204584.Status of the report is criteria_provided_single_submitter, 1 stars.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
NBAS	NM_015909.4	c.3164T>C	p.Leu1055Pro	missense_variant	Exon 28 of 52	ENST00000281513.10	NP_056993.2

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
NBAS	ENST00000281513.10	c.3164T>C	p.Leu1055Pro	missense_variant	Exon 28 of 52	1	NM_015909.4	ENSP00000281513.5

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome Cov.: 31

GnomAD4 genome Cov.: 32

Alfa AF: 0.00 Hom.: 0

ClinVar

Significance: Likely pathogenic

Submissions summary: Pathogenic:2

Revision: criteria provided, single submitter

Submissions by phenotype

Infantile liver failure syndrome 2 Pathogenic:1

Jul 02, 2015

OMIM

Significance: Pathogenic

Review Status: no assertion criteria provided

Collection Method: literature only

- -

Short stature-optic atrophy-Pelger-Huët anomaly syndrome Pathogenic:1

Jul 16, 2018

Molecular Diagnostics Laboratory, M Health Fairview: University of Minnesota

Significance: Likely pathogenic

Review Status: criteria provided, single submitter

Collection Method: clinical testing

- -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Pathogenic	0.91
BayesDel_addAF	Pathogenic	0.24	D
BayesDel_noAF	Uncertain	0.10
CADD	Pathogenic	27
DANN	Pathogenic	1.0
DEOGEN2	Uncertain	0.43	T;.
Eigen	Uncertain	0.48
Eigen_PC	Uncertain	0.55
FATHMM_MKL	Pathogenic	0.98	D
LIST_S2	Uncertain	0.90	D;D
M_CAP	Benign	0.050	D
MetaRNN	Uncertain	0.59	D;D
MetaSVM	Benign	-0.40	T
MutationAssessor	Uncertain	2.5	M;.
PhyloP100		8.5
PrimateAI	Uncertain	0.56	T
PROVEAN	Pathogenic	-4.8	D;D
REVEL	Uncertain	0.52
Sift	Uncertain	0.0020	D;D
Sift4G	Uncertain	0.0020	D;.
Polyphen		1.0	D;.
Vest4		0.98
MutPred		0.36		Gain of relative solvent accessibility (P = 0.0027);.;
MVP		0.32
MPC		0.30
ClinPred		0.99	D
GERP RS		5.5
Varity_R		0.87
gMVP		0.77
Mutation Taster		=8/92	disease causing (ClinVar)

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: rs796052121; hg19: chr2-15534444;