Physicochemical Properties of Peptide



PPepDB ID:PPepDB_5122
Number of amino acids:86
Molecular Weight:9390.99 Da
Theoretical pI:8.43


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)44.65%
Cysteine CYS (C)910.47%
Glutamic Acid GLU (E)11.16%
Aspartic Acid ASP (D)55.81%
Glycine GLY (G)44.65%
Phynylalanine PHE (F)55.81%
Isoleucine ILE (I)11.16%
Histidine HIS (H)11.16%
Lysine LYS (K)78.14%
Methionine MET (M)33.49%
Leucine LEU (L)1112.79%
Asparagine ASN (N)55.81%
Glutamine GLN (Q)11.16%
Proline PRO (P)55.81%
Serine SER (S)1112.79%
Arginine ARG (R)22.33%
Threonine THR (T)55.81%
Tryptophan TRP (W)11.16%
Valine VAL (V)44.65%
Tyrosine TYR (Y)11.16%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC407
HydrogenH648
NitrogenN108
OxygenO122
SulphurS12

FormulaC407H648N108O122S12
Total Number of Atoms:1297


Total number of positively charged residues (ARG + LYS):9
Total number of negatively charged residues (ASP + GLU):6
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    7490
Absorption 0.1% (=1 g/l)    0.798,   assuming all pairs of CYS residues form cystines

Ext. coefficient    6990
Absorption 0.1% (=1 g/l)    0.744,   assuming all CYS residues are reduced
Aromaticity:0.081

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 53.44

This indicates that the protein/peptide is unstable
Secondary Structure Fraction [Helix, Turn, Sheet]:[26.74, 29.07, 22.09]

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:72.5581
Grand average of hydropathicity (GRAVY):0.08