Physicochemical Properties of Peptide



PPepDB ID:PPepDB_4185
Number of amino acids:398
Molecular Weight:43274.2 Da
Theoretical pI:9.06


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)317.79%
Cysteine CYS (C)82.01%
Glutamic Acid GLU (E)205.03%
Aspartic Acid ASP (D)215.28%
Glycine GLY (G)328.04%
Phynylalanine PHE (F)174.27%
Isoleucine ILE (I)112.76%
Histidine HIS (H)92.26%
Lysine LYS (K)133.27%
Methionine MET (M)51.26%
Leucine LEU (L)358.79%
Asparagine ASN (N)123.02%
Glutamine GLN (Q)92.26%
Proline PRO (P)276.78%
Serine SER (S)4110.3%
Arginine ARG (R)358.79%
Threonine THR (T)215.28%
Tryptophan TRP (W)61.51%
Valine VAL (V)4110.3%
Tyrosine TYR (Y)41.01%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC1903
HydrogenH3031
NitrogenN561
OxygenO568
SulphurS13

FormulaC1903H3031N561O568S13
Total Number of Atoms:6076


Total number of positively charged residues (ARG + LYS):48
Total number of negatively charged residues (ASP + GLU):41
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    39460
Absorption 0.1% (=1 g/l)    0.912,   assuming all pairs of CYS residues form cystines

Ext. coefficient    38960
Absorption 0.1% (=1 g/l)    0.900,   assuming all CYS residues are reduced
Aromaticity:0.068

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 54.10

This indicates that the protein/peptide is unstable
Secondary Structure Fraction [Helix, Turn, Sheet]:[28.64, 28.14, 22.86]

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:82.7387
Grand average of hydropathicity (GRAVY):-0.20