Physicochemical Properties of Peptide



PPepDB ID:PPepDB_5553
Number of amino acids:222
Molecular Weight:23925.47 Da
Theoretical pI:6.56


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)167.21%
Cysteine CYS (C)20.9%
Glutamic Acid GLU (E)41.8%
Aspartic Acid ASP (D)125.41%
Glycine GLY (G)188.11%
Phynylalanine PHE (F)177.66%
Isoleucine ILE (I)146.31%
Histidine HIS (H)52.25%
Lysine LYS (K)83.6%
Methionine MET (M)31.35%
Leucine LEU (L)188.11%
Asparagine ASN (N)177.66%
Glutamine GLN (Q)104.5%
Proline PRO (P)167.21%
Serine SER (S)156.76%
Arginine ARG (R)73.15%
Threonine THR (T)83.6%
Tryptophan TRP (W)00%
Valine VAL (V)2812.61%
Tyrosine TYR (Y)41.8%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC1089
HydrogenH1694
NitrogenN288
OxygenO309
SulphurS5

FormulaC1089H1694N288O309S5
Total Number of Atoms:3385


Total number of positively charged residues (ARG + LYS):15
Total number of negatively charged residues (ASP + GLU):16
Extinction Coefficient:This protein does not contain any Tryptophan residues. Experience shows that this could result in more than 10% error in the computed extinction coefficient.

Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    6085
Absorption 0.1% (=1 g/l)    0.254,   assuming all pairs of CYS residues form cystines

Ext. coefficient    5960
Absorption 0.1% (=1 g/l)    0.249,   assuming all CYS residues are reduced
Aromaticity:0.095

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 23.90

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[36.49, 29.73, 18.47]

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:100
Grand average of hydropathicity (GRAVY):0.23