Iron-Sulfur Cluster Scaffold Homolog (ISCU) Human Recombinant Protein

Iron-sulfur (Fe-S) clusters are necessary for several mitochondrial enzymes and other subcellular compartment proteins. They contain sulfur and iron, and are created via several steps that include cysteine desulfurases, iron donors, chaperones, and scaffold proteins. This gene encodes the two isomeric forms, ISCU1 and ISCU2, of the Fe-S cluster scaffold protein. Mutations in this gene have been found in patients with myopathy with severe exercise intolerance and myoglobinuria. A pseudogene of this gene is present on chromosome 1. Alternative splicing results in multiple transcript variants encoding different isoforms. [provided by RefSeq, Jul 2014]

ISCU: Involved in the assembly or repair of the [Fe-S] clusters present in iron-sulfur proteins. Binds iron. Defects in ISCU are the cause of myopathy with exercise intolerance Swedish type (MEIS); also known as myopathy with deficiency of succinate dehydrogenase and aconitase or myoglobinuria due to abnormal glycolysis or hereditary myopathy with lactic acidosis (HML). This autosomal recessive metabolic disease is characterized by lifelong severe exercise intolerance, in which minor exertion causes fatigue of active muscles, shortness of breath, and cardiac palpitations in association with lactic acidosis. The biochemical phenotype is characterized by a deficiency in mitochondrial iron-sulfur proteins and impaired muscle oxidative metabolism. Belongs to the NifU family. 2 isoforms of the human protein are produced by alternative splicing.

Protein type: Mitochondrial

Chromosomal Location of Human Ortholog: 12q24.1

Cellular Component: mitochondrion; mitochondrial matrix; cytoplasm; nucleus; cytosol

Molecular Function: protein binding; iron ion binding; iron-sulfur cluster binding; protein complex scaffold

Biological Process: iron-sulfur cluster assembly; nitrogen fixation

Disease: Myopathy With Lactic Acidosis, Hereditary