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. 2022 Oct 6;15:979061. doi: 10.3389/fnmol.2022.979061

TABLE 2.

Five positional candidate genes for syndromic NDDs identified by in silico CNV mapping at 1p13.3.

No. Gene candidate & MIM Variants in human and KO mice with NDDs phenotype Protein interactors (references for interaction and variants in human with NDDs)
1 VAV3 (VAV guanine nucleotide exchange factor 3) (605541)
2 WDR47 (WD repeat-containing protein 47) (615734)
  • 1.

    Autism spectrum disorder: de novo c.991_992delAT (NM_014969.6); p.I331Ffs*16 (NP_055784.3) (Callaghan et al., 2019)

  • 2.

    The neuroanatomical deficits associated with Wdr47 KO cause hyperactivity and inappropriate sensory motor gating in both male and female mice (Kannan et al., 2017).

  • 3.

    The overall brain size of Wdr47tm1a/tm1a mice was reduced, indicating initial microcephaly that worsened postnatally (Kannan et al., 2017).

  • 4.

    Mutations in 27 WDR genes (∼9 %) have been linked to brain disorders especially intellectual disability related to corpus callosum defects (Kannan et al., 2017).

3 ELAPOR1 (Endosome-lysosome-associated apoptosis and autophagy regulator 1) (611298)
4 GSTM5 (Glutathione S-Transferase Mu 5) (138385)
  • 1.

    GSTM5 belongs to the glutathione S-transferase enzyme family. GSTM5 is located in the brain and metabolizes a wide range of substances, both exogenous and endogenous (Eaton and Bammler, 1999)

  • 2.

    GSTs (Glutathione S-transferases), which are involved in the glutathione metabolism pathway and include GstA3, Gstm1, Gstm5, Gstm3, Gstk1, and Gstp1, have been identified as risk factors for Alzheimer’s disease (Lin et al., 2017)

  • 3.

    Polymorphisms in GSTM5 predicted microRNA binding sites were associated with Parkinson’s disease diagnosis age (Searles Nielsen et al., 2013)

  • 4.

    KO mouse phenotypes associated with decreased exploration in new environment: http://www.informatics.jax.org/diseasePortal/genoCluster/view/44861

5 LRIF1 (Ligand-dependent nuclear receptor-interacting factor 1) (1615354)

The candidacy of these genes was justified by their genomic positions in CNV mapping, sporadic variants reported in them and their interactors in NDDs, their physical interaction with known neurodevelopmental genes, and KO mice phenotype based on HGMD, BioGrid, STRING, and MGI. Due to a large number of interacting genes, only a limited number of them in NDD were described. KO mice data with neurobehavioral phenotype are also mentioned wherever available.