Physicochemical Properties of Peptide



PPepDB ID:PPepDB_5454
Number of amino acids:374
Molecular Weight:41396.04 Da
Theoretical pI:8.95


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)328.56%
Cysteine CYS (C)10.27%
Glutamic Acid GLU (E)133.48%
Aspartic Acid ASP (D)174.55%
Glycine GLY (G)246.42%
Phynylalanine PHE (F)215.61%
Isoleucine ILE (I)225.88%
Histidine HIS (H)41.07%
Lysine LYS (K)154.01%
Methionine MET (M)71.87%
Leucine LEU (L)359.36%
Asparagine ASN (N)256.68%
Glutamine GLN (Q)112.94%
Proline PRO (P)215.61%
Serine SER (S)4010.7%
Arginine ARG (R)195.08%
Threonine THR (T)195.08%
Tryptophan TRP (W)71.87%
Valine VAL (V)256.68%
Tyrosine TYR (Y)164.28%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC1876
HydrogenH2887
NitrogenN497
OxygenO546
SulphurS8

FormulaC1876H2887N497O546S8
Total Number of Atoms:5814


Total number of positively charged residues (ARG + LYS):34
Total number of negatively charged residues (ASP + GLU):30
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    62340
Absorption 0.1% (=1 g/l)    1.506,   assuming all pairs of CYS residues form cystines

Ext. coefficient    62340
Absorption 0.1% (=1 g/l)    1.506,   assuming all CYS residues are reduced
Aromaticity:0.118

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 45.47

This indicates that the protein/peptide is unstable
Secondary Structure Fraction [Helix, Turn, Sheet]:[33.69, 29.41, 23.26]

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:87.3797
Grand average of hydropathicity (GRAVY):-0.09