Physicochemical Properties of Peptide



PPepDB ID:PPepDB_5743
Number of amino acids:378
Molecular Weight:41880.3 Da
Theoretical pI:8.13


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)195.03%
Cysteine CYS (C)92.38%
Glutamic Acid GLU (E)174.5%
Aspartic Acid ASP (D)236.08%
Glycine GLY (G)246.35%
Phynylalanine PHE (F)215.56%
Isoleucine ILE (I)153.97%
Histidine HIS (H)92.38%
Lysine LYS (K)92.38%
Methionine MET (M)61.59%
Leucine LEU (L)3810.05%
Asparagine ASN (N)123.17%
Glutamine GLN (Q)112.91%
Proline PRO (P)215.56%
Serine SER (S)4912.96%
Arginine ARG (R)338.73%
Threonine THR (T)287.41%
Tryptophan TRP (W)41.06%
Valine VAL (V)256.61%
Tyrosine TYR (Y)51.32%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC1833
HydrogenH2899
NitrogenN531
OxygenO564
SulphurS15

FormulaC1833H2899N531O564S15
Total Number of Atoms:5842


Total number of positively charged residues (ARG + LYS):42
Total number of negatively charged residues (ASP + GLU):40
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    29950
Absorption 0.1% (=1 g/l)    0.715,   assuming all pairs of CYS residues form cystines

Ext. coefficient    29450
Absorption 0.1% (=1 g/l)    0.703,   assuming all CYS residues are reduced
Aromaticity:0.079

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 54.96

This indicates that the protein/peptide is unstable
Secondary Structure Fraction [Helix, Turn, Sheet]:[28.57, 28.04, 21.16]

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:78.8888
Grand average of hydropathicity (GRAVY):-0.27