Physicochemical Properties of Peptide



PPepDB ID:PPepDB_5216
Number of amino acids:289
Molecular Weight:31676.25 Da
Theoretical pI:7.93


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)3110.73%
Cysteine CYS (C)10.35%
Glutamic Acid GLU (E)113.81%
Aspartic Acid ASP (D)124.15%
Glycine GLY (G)144.84%
Phynylalanine PHE (F)124.15%
Isoleucine ILE (I)227.61%
Histidine HIS (H)10.35%
Lysine LYS (K)103.46%
Methionine MET (M)72.42%
Leucine LEU (L)3211.07%
Asparagine ASN (N)196.57%
Glutamine GLN (Q)113.81%
Proline PRO (P)103.46%
Serine SER (S)2910.03%
Arginine ARG (R)144.84%
Threonine THR (T)206.92%
Tryptophan TRP (W)10.35%
Valine VAL (V)186.23%
Tyrosine TYR (Y)144.84%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC1419
HydrogenH2256
NitrogenN374
OxygenO429
SulphurS8

FormulaC1419H2256N374O429S8
Total Number of Atoms:4486


Total number of positively charged residues (ARG + LYS):24
Total number of negatively charged residues (ASP + GLU):23
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    26360
Absorption 0.1% (=1 g/l)    0.832,   assuming all pairs of CYS residues form cystines

Ext. coefficient    26360
Absorption 0.1% (=1 g/l)    0.832,   assuming all CYS residues are reduced
Aromaticity:0.093

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 34.49

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[34.26, 24.91, 28.03]

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:101.661
Grand average of hydropathicity (GRAVY):0.11