Our verdict is Uncertain significance. Variant got 2 ACMG points: 3P and 1B. PM2PP3BP4
The NM_001037132.4(NRCAM):c.3478C>T(p.Arg1160Trp) variant causes a missense change. The variant allele was found at a frequency of 0.00000137 in 1,460,584 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 (★).
NRCAM (HGNC:7994): (neuronal cell adhesion molecule) Cell adhesion molecules (CAMs) are members of the immunoglobulin superfamily. This gene encodes a neuronal cell adhesion molecule with multiple immunoglobulin-like C2-type domains and fibronectin type-III domains. This ankyrin-binding protein is involved in neuron-neuron adhesion and promotes directional signaling during axonal cone growth. This gene is also expressed in non-neural tissues and may play a general role in cell-cell communication via signaling from its intracellular domain to the actin cytoskeleton during directional cell migration. Allelic variants of this gene have been associated with autism and addiction vulnerability. Alternative splicing results in multiple transcript variants encoding different isoforms. [provided by RefSeq, Jul 2008]
Review Status: criteria provided, single submitter
Collection Method: clinical testing
The c.3478C>T (p.R1160W) alteration is located in exon 28 (coding exon 28) of the NRCAM gene. This alteration results from a C to T substitution at nucleotide position 3478, causing the arginine (R) at amino acid position 1160 to be replaced by a tryptophan (W). Based on insufficient or conflicting evidence, the clinical significance of this alteration remains unclear. -