Physicochemical Properties of Peptide



PPepDB ID:PPepDB_5781
Number of amino acids:96
Molecular Weight:10838.88 Da
Theoretical pI:9.24


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)44.17%
Cysteine CYS (C)1212.5%
Glutamic Acid GLU (E)22.08%
Aspartic Acid ASP (D)11.04%
Glycine GLY (G)55.21%
Phynylalanine PHE (F)55.21%
Isoleucine ILE (I)22.08%
Histidine HIS (H)11.04%
Lysine LYS (K)1111.46%
Methionine MET (M)33.13%
Leucine LEU (L)88.33%
Asparagine ASN (N)66.25%
Glutamine GLN (Q)33.13%
Proline PRO (P)77.29%
Serine SER (S)77.29%
Arginine ARG (R)33.13%
Threonine THR (T)66.25%
Tryptophan TRP (W)11.04%
Valine VAL (V)44.17%
Tyrosine TYR (Y)55.21%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC477
HydrogenH750
NitrogenN128
OxygenO130
SulphurS15

FormulaC477H750N128O130S15
Total Number of Atoms:1500


Total number of positively charged residues (ARG + LYS):14
Total number of negatively charged residues (ASP + GLU):3
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    13700
Absorption 0.1% (=1 g/l)    1.264,   assuming all pairs of CYS residues form cystines

Ext. coefficient    12950
Absorption 0.1% (=1 g/l)    1.195,   assuming all CYS residues are reduced
Aromaticity:0.115

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 35.47

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[26.04, 26.04, 17.71]

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:56.875
Grand average of hydropathicity (GRAVY):-0.20