Physicochemical Properties of Peptide



PPepDB ID:PPepDB_6057
Number of amino acids:100
Molecular Weight:11297.09 Da
Theoretical pI:9.93


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)66%
Cysteine CYS (C)00%
Glutamic Acid GLU (E)66%
Aspartic Acid ASP (D)00%
Glycine GLY (G)33%
Phynylalanine PHE (F)44%
Isoleucine ILE (I)22%
Histidine HIS (H)99%
Lysine LYS (K)1010%
Methionine MET (M)11%
Leucine LEU (L)99%
Asparagine ASN (N)44%
Glutamine GLN (Q)55%
Proline PRO (P)1717%
Serine SER (S)66%
Arginine ARG (R)33%
Threonine THR (T)44%
Tryptophan TRP (W)00%
Valine VAL (V)88%
Tyrosine TYR (Y)33%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC520
HydrogenH808
NitrogenN146
OxygenO135
SulphurS1

FormulaC520H808N146O135S1
Total Number of Atoms:1610


Total number of positively charged residues (ARG + LYS):13
Total number of negatively charged residues (ASP + GLU):6
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    4470
Absorption 0.1% (=1 g/l)    0.396
Aromaticity:0.070

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 67.90

This indicates that the protein/peptide is unstable
Secondary Structure Fraction [Helix, Turn, Sheet]:[26.00, 30.00, 22.00]

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:72.1
Grand average of hydropathicity (GRAVY):-0.73