An alternatively spliced transcript of the PHD3 gene retains prolyl hydroxylase activity. 2006

Ana M Cervera, and Nadezda Apostolova, and Francisco Luna-Crespo, and Alejandra Sanjuan-Pla, and Remedios Garcia-Bou, and Kenneth J McCreath
Unidad Mixta de Investigación Centro Nacional de Investigaciones Cardiovasculares Carlos III-Universitat de València, Avenida Blasco-Ibañez 15-17, 46.010 Valencia, Spain.

Cellular response to limiting oxygen levels is managed, in part, by the transcription factor hypoxia-inducible factor 1 (HIF-1), and the prolyl hydroxylase (PHD) family of oxygen-requiring enzymes. In the process of analyzing the expression of PHD3, we observed the presence of two alternatively processed PHD3 transcripts, designated PHD3Delta1 and PHD3Delta4 . The expression of both PHD3 and PHD3Delta1 was observed in all tissues and cell lines tested, although the expression of the novel PHD3Delta4 appeared to be restricted to primary cancer tissues. The function of PHD3Delta4 was assessed in transfection experiments showing a preserved prolyl hydroxylase activity. We would submit that PHD3 variants generated by alternative splicing may be intrinsically involved in the complex system of oxygen sensing.

UI MeSH Term Description Entries
D008969 Molecular Sequence Data Descriptions of specific amino acid, carbohydrate, or nucleotide sequences which have appeared in the published literature and/or are deposited in and maintained by databanks such as GENBANK, European Molecular Biology Laboratory (EMBL), National Biomedical Research Foundation (NBRF), or other sequence repositories. Sequence Data, Molecular,Molecular Sequencing Data,Data, Molecular Sequence,Data, Molecular Sequencing,Sequencing Data, Molecular
D011393 Procollagen-Proline Dioxygenase A mixed-function oxygenase that catalyzes the hydroxylation of a prolyl-glycyl containing peptide, usually in PROTOCOLLAGEN, to a hydroxyprolylglycyl-containing-peptide. The enzyme utilizes molecular OXYGEN with a concomitant oxidative decarboxylation of 2-oxoglutarate to SUCCINATE. The enzyme occurs as a tetramer of two alpha and two beta subunits. The beta subunit of procollagen-proline dioxygenase is identical to the enzyme PROTEIN DISULFIDE-ISOMERASES. Protocollagen Prolyl Hydroxylase,Procollagen Prolyl 4-Hydroxylase,4-Hydroxylase, Procollagen Prolyl,Dioxygenase, Procollagen-Proline,Hydroxylase, Protocollagen Prolyl,Procollagen Proline Dioxygenase,Procollagen Prolyl 4 Hydroxylase,Prolyl 4-Hydroxylase, Procollagen,Prolyl Hydroxylase, Protocollagen
D006801 Humans Members of the species Homo sapiens. Homo sapiens,Man (Taxonomy),Human,Man, Modern,Modern Man
D006900 Hydroxylation Placing of a hydroxyl group on a compound in a position where one did not exist before. (Stedman, 26th ed) Hydroxylations
D000595 Amino Acid Sequence The order of amino acids as they occur in a polypeptide chain. This is referred to as the primary structure of proteins. It is of fundamental importance in determining PROTEIN CONFORMATION. Protein Structure, Primary,Amino Acid Sequences,Sequence, Amino Acid,Sequences, Amino Acid,Primary Protein Structure,Primary Protein Structures,Protein Structures, Primary,Structure, Primary Protein,Structures, Primary Protein
D001483 Base Sequence The sequence of PURINES and PYRIMIDINES in nucleic acids and polynucleotides. It is also called nucleotide sequence. DNA Sequence,Nucleotide Sequence,RNA Sequence,DNA Sequences,Base Sequences,Nucleotide Sequences,RNA Sequences,Sequence, Base,Sequence, DNA,Sequence, Nucleotide,Sequence, RNA,Sequences, Base,Sequences, DNA,Sequences, Nucleotide,Sequences, RNA
D017398 Alternative Splicing A process whereby multiple RNA transcripts are generated from a single gene. Alternative splicing involves the splicing together of other possible sets of EXONS during the processing of some, but not all, transcripts of the gene. Thus a particular exon may be connected to any one of several alternative exons to form a mature RNA. The alternative forms of mature MESSENGER RNA produce PROTEIN ISOFORMS in which one part of the isoforms is common while the other parts are different. RNA Splicing, Alternative,Splicing, Alternative,Alternate Splicing,Nested Transcripts,Alternate Splicings,Alternative RNA Splicing,Alternative RNA Splicings,Alternative Splicings,Nested Transcript,RNA Splicings, Alternative,Splicing, Alternate,Splicing, Alternative RNA,Splicings, Alternate,Splicings, Alternative,Splicings, Alternative RNA,Transcript, Nested,Transcripts, Nested
D045744 Cell Line, Tumor A cell line derived from cultured tumor cells. Tumor Cell Line,Cell Lines, Tumor,Line, Tumor Cell,Lines, Tumor Cell,Tumor Cell Lines
D049308 Dioxygenases Non-heme iron-containing enzymes that incorporate two atoms of OXYGEN into the substrate. They are important in biosynthesis of FLAVONOIDS; GIBBERELLINS; and HYOSCYAMINE; and for degradation of AROMATIC HYDROCARBONS. Dioxygenase
D051795 Hypoxia-Inducible Factor 1, alpha Subunit Hypoxia-inducible factor 1, alpha subunit is a basic helix-loop-helix transcription factor that is regulated by OXYGEN availability and is targeted for degradation by VHL TUMOR SUPPRESSOR PROTEIN. Hypoxia Inducible Factor 1, alpha Subunit

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