PPepDB-ID	"Peptide Name"	PMID	"Plant source"	"Plant Family"	"Peptide Family"	"Peptide function"	"Peptide function description"	"Activity against"	Sequence	"Sequence Length"	Validation	"Avg. Molecular wt(Da)"	"Monoisotopic molecular wt(Da)"	pI	Method	"Additional information"
PPepDB_4634	PER1_SORBI	--NA--	"Sorghum bicolor, Sorghum vulgare"	Poaceae	--NA--	Signaling-peptide	"Calcium; Direct protein sequencing; Glycoprotein; Heme; Hydrogen peroxide; Iron; Metal-binding; Oxidoreductase; Peroxidase; Secreted; Signal | Cationic peroxidase SPC4 precursor (EC 1.11.1.7) (Fragment).Secreted."	--NA--	ATDLVALSGGHTIMSRAPTLAAAAAVAAVVLICSSSTATAADGNARQPPLAPGLSFDFYKRSCPGEQQAPPNLTLRPTAFKAINDIHDRLHKECGGTVVSCSDVLALAARDSVPKAESIVRSFVQDAVRRDVGLAAGLLRLHFHDCFVQGCDASVLLDGSATGVVSGGPSYKVPLGRRDSASFATQQDVLSGLPPPTAAVPALLAVLSKINLD	213	"Experimental evidence at protein level"	21866.97	21853.32	7.13	--NA--	"FUNCTION:Removal of H(2)O(2), oxidation of toxic reductants, biosynthesis and degradation of lignin, suberization, auxin catabolism, response to environmental stresses such as wounding, pathogen attack and oxidative stress. These functions might be dependent on each isozyme/isoform in each plant tissue. Has a high preference for hydroxycinnamates as substrates. Substrate preference is ferulic acid > p-coumaric acid > N-acetyl tyrosine methyl ester > N-acetyl-tyrosine > tyrosine > catechol > Gly-Tyr- Gly. May be involved in the formation of diferulate linkages in the plant cell wall.CATALYTIC ACTIVITY:Donor H(2)O(2) = oxidized donor 2 H(2)O.COFACTOR:Binds 1 heme B (iron-protoporphyrin IX) group per subunit.COFACTOR:Binds 2 calcium ions per subunit.BIOPHYSICOCHEMICAL PROPERTIES:pH dependence: Optimum pH is 3.8 with 2.2'-azino-bis(3-ethylbenzthiazoline-6- sulfonic acid) as substrate, 5.5 with ferulic acid as substrate, and 6.5 with N-acetyl-L-tyrosine as substrate; Temperature dependence: Loss of activity at temperature above 55 degrees Celsius. In the presence of excess calcium, full activity is kept at 65 degrees Celsius for 90 minutes;SUBUNIT:Monomer.TISSUE SPECIFICITY:Present in germinated and ungerminated grain, seedlings, and leaves and stem of the mature plant.PTM:The proportions of glycoforms I and II are 35% and 65% respectively.MASS SPECTROMETRY:Mass=33246; Mass_error=50; Method=MALDI; Range=31-?; Note=Deglycosylated form; Source=PubMed:16650004;MASS SPECTROMETRY:Mass=34283; Mass_error=50; Method=MALDI; Range=31-?; Note=Glycoform I; Source=PubMed:16650004;MASS SPECTROMETRY:Mass=35631; Mass_error=50; Method=MALDI; Range=31-?; Note=Glycoform II; Source=PubMed:16650004;SIMILARITY:Belongs to the peroxidase family. Classical plant (class III) peroxidase subfamily."