title: The proteome of human retina.
abstract: The retina is a delicate tissue that detects light, converts photochemical energy into neural signals, and transmits the signals to the visual cortex of the brain. A detailed protein inventory of the proteome of the normal human eye may provide a foundation for new investigations into both the physiology of the retina and the pathophysiology of retinal diseases. To provide an inventory, proteins were extracted from five retinas of normal eyes and fractionated using SDS-PAGE. After in-gel digestion, peptides were analyzed in duplicate using LC-MS/MS on an Orbitrap Elite mass spectrometer. A total of 3436 nonredundant proteins were identified in the human retina, including 20 unambiguous protein isoforms, of which eight have not previously been demonstrated to exist at the protein level. The proteins identified in the retina included most of the enzymes involved in the visual cycle and retinoid metabolism. One hundred and fifty-eight proteins that have been associated with age-related macular degeneration were identified in the retina. The MS proteome database of the human retina may serve as a valuable resource for future investigations of retinal biology and disease. All MS data have been deposited in the ProteomeXchange with identifier PXD001242 (http://proteomecentral.proteomexchange.org/dataset/PXD001242).
authors.affiliation: Department of Ophthalmology, Johns Hopkins University School of Medicine, Baltimore, MD, USA.
authors.forename: Pingbo
authors.initials: P
authors.lastname: Zhang
authors.forename: Craig
authors.initials: C
authors.lastname: Dufresne
authors.forename: Randi
authors.initials: R
authors.lastname: Turner
authors.forename: Sara
authors.initials: S
authors.lastname: Ferri
authors.forename: Vidya
authors.initials: V
authors.lastname: Venkatraman
authors.forename: Rabia
authors.initials: R
authors.lastname: Karani
authors.forename: Gerard A
authors.initials: GA
authors.lastname: Lutty
authors.forename: Jennifer E
authors.initials: JE
authors.lastname: Van Eyk
authors.forename: Richard D
authors.initials: RD
authors.lastname: Semba
mesh_terms: D030562:Databases, Protein; D005136:Eye Proteins / Q000032:analysis / Q000737:chemistry* / Q000145:classification; D006801:Humans; D020543:Proteome / Q000032:analysis / Q000737:chemistry*; D012160:Retina / Q000737:chemistry*
chemical_list: D005136:Eye Proteins; D020543:Proteome
keywords: Age-related macular degeneration; Biomedicine; Eye; Human; Phototransduction; Retina