Physicochemical Properties of Peptide



PPepDB ID:PPepDB_1191
Number of amino acids:137
Molecular Weight:14795.25 Da
Theoretical pI:7.93


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)107.3%
Cysteine CYS (C)139.49%
Glutamic Acid GLU (E)75.11%
Aspartic Acid ASP (D)64.38%
Glycine GLY (G)107.3%
Phynylalanine PHE (F)21.46%
Isoleucine ILE (I)118.03%
Histidine HIS (H)21.46%
Lysine LYS (K)96.57%
Methionine MET (M)42.92%
Leucine LEU (L)85.84%
Asparagine ASN (N)107.3%
Glutamine GLN (Q)21.46%
Proline PRO (P)64.38%
Serine SER (S)85.84%
Arginine ARG (R)64.38%
Threonine THR (T)75.11%
Tryptophan TRP (W)00%
Valine VAL (V)128.76%
Tyrosine TYR (Y)42.92%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC630
HydrogenH1034
NitrogenN180
OxygenO195
SulphurS17

FormulaC630H1034N180O195S17
Total Number of Atoms:2056


Total number of positively charged residues (ARG + LYS):15
Total number of negatively charged residues (ASP + GLU):13
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    6710
Absorption 0.1% (=1 g/l)    0.454,   assuming all pairs of CYS residues form cystines

Ext. coefficient    5960
Absorption 0.1% (=1 g/l)    0.403,   assuming all CYS residues are reduced
Aromaticity:0.044

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 29.72

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[27.01, 24.82, 21.17]

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:86.7883
Grand average of hydropathicity (GRAVY):0.06