PROSC is ubiquitously expressed in human tissues and has been highly conserved among divergent species from bacteria to mammals, suggesting it has an important cellular function. PROSC is likely to be a soluble cytoplasmic protein, but its function remains to be determined. The P. aeruginosa homolog of this novel gene is located upstream of and may be cotranscribed with a known proline biosynthetic gene, hence the human gene was celled PROSC, for 'proline synthetase cotranscribed, bacterial homolog.Synonyms: Proline synthase co-transcribed bacterial homolog protein