Disease relevance of Porphyra

• The deduced polypeptide sequence is homologous to other reported HOs from organisms containing phycobilisomes (Porphyra purpurea and Synechocystis sp. strain PCC 6803) and, to a lesser extent, to vertebrate enzymes [1].

High impact information on Porphyra

• This fraction could be replaced with commercial ferredoxin derived from spinach or the red alga, Porphyra umbilicalis [2].
• Variant forms of a group I intron in nuclear small-subunit rRNA genes of the marine red alga Porphyra spiralis var. amplifolia [3].
• The cp-genome of C. caldarium cannot be readily aligned with that of Porphyra purpurea, a multicellular red alga, or Guillardia theta due to a displacement of a region of the cp-genome [4].
• We previously reported that fatty acyl-CoA esters activate ryanodine receptor/Ca2+ release channels in a terminal cisternae fraction from rabbit skeletal muscle [Fulceri, Nori, Gamberucci, Volpe, Giunti and Benedetti (1994) Cell Calcium 15, 109-116] [5].
• The 5S ribosomal RNA sequences have been determined for the rhodoplast of the red alga Porphyra umbilicalis and the chloroplast of the conifer Juniperus media [6].

Biological context of Porphyra

• A gene encoding a thioredoxin protein was identified in the chloroplast genome of the rhodophyte Porphyra yezoensis [7].
• The Porphyra intron self-splices in vitro, and generates both ligated exons and a full-length intron RNA circle [8].
• Bioavailability of dried asakusanori (porphyra tenera) as a source of Cobalamin (Vitamin B12) [9].
• Sulfated polysaccharide fraction F2 from Porphyra haitanesis (Rhodephyta) showed inhibitory effect on the in vitro lipid peroxidation [10].
• The deduced amino acid sequences for Arabidopsis plastid E1 alpha and E1 beta have 61% and 68% identity to the odpA and odpB genes of the red alga Porphyra purpurea, respectively, but only 31% and 32% identity to the plant mitochondrial counterparts [11].

Associations of Porphyra with chemical compounds

• An earlier report (T. Fujiwara, J. Biochem. 49:361-367, 1961) contended, on the basis of the isolation of sugar-containing peptic chromopeptides from Porphyra tenera R-phycoerythrin, that this red algal phycobiliprotein is a glycoprotein [12].
• To investigate the role of the heme axial ligand in the conformational stability of c-type cytochrome, we constructed M58C and M58H mutants of the red alga Porphyra yezoensis cytochrome c(6) in which the sixth heme iron ligand (Met58) was replaced with Cys and His residues, respectively [13].
• ESI-MS/MS showed unusual small radical losses, generally resulting from the loss of a methyl group with the exception of shinorine and porphyra for which the initial losses were 30 and 44 Da, respectively [14].
• Polysaccharide from Porphyra yezoensis (PYPS) was degraded by ultrasound in this study [15].
• Three porphyran preparations with high emulsifying ability and varying molecular mass, 3,6-anhydrogalactose content, and sulfate content without any protenaceous component were prepared from dried nori processed from Porphyra yezoensis, a red alga [16].

Gene context of Porphyra

• Porphyra contains two loci for ppcBA and Griffithsia has two loci for rpoA [17].
• Elongation factor 1 alpha genes of the red alga Porphyra purpurea include a novel, developmentally specialized variant [18].
• Altogether, 12 different species of seaweeds were analyzed for iodine content, and found to range from 16 microg/g (+/-2) in nori (Porphyra tenera) to over 8165 +/- 373 microg/g in one sample of processed kelp granules (a salt substitute) made from Laminaria digitata [19].
• The structure of a sulfated galactan from Porphyra haitanensis and its in vivo antioxidant activity [20].
• Telomerase inhibition by sulfoquinovosyldiacylglycerol from edible purple laver (Porphyra yezoensis) [21].

References