Physicochemical Properties of Peptide



PPepDB ID:PPepDB_1111
Number of amino acids:112
Molecular Weight:12056.68 Da
Theoretical pI:5.73


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)119.82%
Cysteine CYS (C)108.93%
Glutamic Acid GLU (E)87.14%
Aspartic Acid ASP (D)54.46%
Glycine GLY (G)65.36%
Phynylalanine PHE (F)32.68%
Isoleucine ILE (I)21.79%
Histidine HIS (H)43.57%
Lysine LYS (K)54.46%
Methionine MET (M)21.79%
Leucine LEU (L)87.14%
Asparagine ASN (N)54.46%
Glutamine GLN (Q)43.57%
Proline PRO (P)32.68%
Serine SER (S)108.93%
Arginine ARG (R)54.46%
Threonine THR (T)76.25%
Tryptophan TRP (W)00%
Valine VAL (V)1210.71%
Tyrosine TYR (Y)21.79%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC507
HydrogenH817
NitrogenN149
OxygenO167
SulphurS12

FormulaC507H817N149O167S12
Total Number of Atoms:1652


Total number of positively charged residues (ARG + LYS):10
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    3605
Absorption 0.1% (=1 g/l)    0.299,   assuming all pairs of CYS residues form cystines

Ext. coefficient    2980
Absorption 0.1% (=1 g/l)    0.247,   assuming all CYS residues are reduced
Aromaticity:0.045

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 46.15

This indicates that the protein/peptide is unstable
Secondary Structure Fraction [Helix, Turn, Sheet]:[24.11, 21.43, 25.89]

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:75.7143
Grand average of hydropathicity (GRAVY):-0.07