Physicochemical Properties of Peptide



PPepDB ID:PPepDB_831
Number of amino acids:247
Molecular Weight:25478.57 Da
Theoretical pI:6.06


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)2710.93%
Cysteine CYS (C)176.88%
Glutamic Acid GLU (E)52.02%
Aspartic Acid ASP (D)104.05%
Glycine GLY (G)2710.93%
Phynylalanine PHE (F)145.67%
Isoleucine ILE (I)114.45%
Histidine HIS (H)20.81%
Lysine LYS (K)124.86%
Methionine MET (M)31.21%
Leucine LEU (L)104.05%
Asparagine ASN (N)104.05%
Glutamine GLN (Q)62.43%
Proline PRO (P)124.86%
Serine SER (S)3012.15%
Arginine ARG (R)20.81%
Threonine THR (T)2510.12%
Tryptophan TRP (W)31.21%
Valine VAL (V)114.45%
Tyrosine TYR (Y)104.05%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC1112
HydrogenH1690
NitrogenN288
OxygenO359
SulphurS20

FormulaC1112H1690N288O359S20
Total Number of Atoms:3469


Total number of positively charged residues (ARG + LYS):14
Total number of negatively charged residues (ASP + GLU):15
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    32400
Absorption 0.1% (=1 g/l)    1.272,   assuming all pairs of CYS residues form cystines

Ext. coefficient    31400
Absorption 0.1% (=1 g/l)    1.232,   assuming all CYS residues are reduced
Aromaticity:0.109

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 37.22

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[23.89, 31.98, 18.22]

Amino acids in helix: V, I, Y, F, W, L || Amino acids in turn: N, P, G, S || Amino acids in sheet: E, M, A, L
Aliphatic index:57.0041
Grand average of hydropathicity (GRAVY):0.05