Abstract:
:We have identified a human pituitary protein as a novel glycosylated variant of hGH. Isolation of the denatured protein included separation of human pituitary extract by Sephadex G-100 chromatography in ammonium bicarbonate, followed by Sephadex G-100 chromatography in 10% acetic acid, with subsequent DEAE Sephacryl chromatography in ammonium bicarbonate, and finally by preparative SDS PAGE. The pituitary protein has a molecular weight of 24 kDa as determined by SDS PAGE analysis and is thus larger than the normal 22 kDa hGH. N-Terminal amino acid sequence analysis of the first twenty-six residues reveals that this protein is not derived from the hGH-V gene but is rather a hGH-N gene product. Assays for the detection of glycoconjugates (periodate oxidation, sialidase treatment, trifluoromethanesulfonic acid treatment) indicate that the hGH variant has carbohydrate moieties. The discovery of new hGH raises questions about the role of glycosylation in the structure/function relationships of this hormone.
journal_name
Biochem Biophys Res Communjournal_title
Biochemical and biophysical research communicationsauthors
Haro LS,Lewis UJ,Garcia M,Bustamante J,Martinez AO,Ling NCdoi
10.1006/bbrc.1996.1697subject
Has Abstractpub_date
1996-11-12 00:00:00pages
549-56issue
2eissn
0006-291Xissn
1090-2104pii
S0006-291X(96)91697-6journal_volume
228pub_type
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