Kinase D-interacting substrate of 220 kDa or ARMS (ankyrin repeat-rich membrane spanning) is a scaffold protein that in humans is encoded by the ''KIDINS220'' gene. It is a downstream target of neuronal signaling events initiated by neutrophins and

ephrins Ephrins (also known as ephrin ligands or Eph family receptor interacting proteins) are a family of proteins that serve as the ligands of the Eph receptor. Eph receptors in turn compose the largest known subfamily of receptor protein-tyrosine kinas ...

. Additionally, it was shown to have important roles in the immune system by interacting with the

B-cell B cells, also known as B lymphocytes, are a type of white blood cell of the lymphocyte subtype. They function in the humoral immunity component of the adaptive immune system. B cells produce antibody molecules which may be either secreted o ...

and T-cell receptor.

Molecular biology

The gene is located on the short arm of chromosome 2 (2p25.1) on the Crick strand. It is 116,550 bases in length. It encodes a transmembrane protein that is preferentially expressed in the nervous system. The protein acts as a receptor for the CRKL-C3G complex. Binding this complex results in Rap1-dependent sustained ERK activation. This, in turn, interacts with several pathways the effects of which are under active investigation.

Clinical importance

Heterozygous mutations of this gene have been suggested as a cause of a syndrome consisting of spastic paraplegia, intellectual disability, nystagmus and obesity. Knock out mice with homozygous mutations have non-viable offspring with enlarged cerebral ventricles. A consanginous couple has been reported who suffered from repeated miscarriages in whom homozygous mutations of this gene were found.Mero IL, Mørk HH, Sheng Y, Blomhoff A, Opheim GL, Erichsen A, Vigeland MD, Selmer KK (2017) Homozygous KIDINS220 loss-of-function variants in fetuses with cerebral ventriculomegaly and limb contractures. Hum Mol Genet 26(19):3792-3796 Post mortem showed enlarged cerebral ventricles and contracted limbs.

Molecular biology

Clinical importance

References

Further reading