Proteasome (prosome, macropain) subunit, alpha 1
Protein expression
### Protein expression

Th gene PSMA1 encodes a member of the peptidase T1A family, that is a 20S core alpha subunit. In a study of mouse gene PSMA1 which share 98% homology with human gene, the gene was isolated and cloned, and then identified as C2 subunit of the 20S proteasome (old nomenclature). The gene has 10 exons that are distributed over a 12kb region on mouse chromosome 7\. The same study showed that mouse genes Psma1 and Pde3b are closely linked, residing between cM 53 and 53\.3 in a region syntenic to human chromosome 11p15\. The human protein **proteasome subunit alpha type\-1** is also known as 20S proteasome subunit alpha\-6 (based on systematic nomenclature). The protein is 30 kDa in size and composed of 263 amino acids. The calculated theoretical pI of this protein is 6\.15\.


How many amino acids does the human protein proteasome subunit alpha type-1 have?