Physicochemical Properties of Peptide



PPepDB ID:PPepDB_5849
Number of amino acids:275
Molecular Weight:29883.69 Da
Theoretical pI:7.7


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)228%
Cysteine CYS (C)82.91%
Glutamic Acid GLU (E)82.91%
Aspartic Acid ASP (D)155.45%
Glycine GLY (G)2810.18%
Phynylalanine PHE (F)103.64%
Isoleucine ILE (I)155.45%
Histidine HIS (H)62.18%
Lysine LYS (K)114%
Methionine MET (M)72.55%
Leucine LEU (L)155.45%
Asparagine ASN (N)196.91%
Glutamine GLN (Q)62.18%
Proline PRO (P)165.82%
Serine SER (S)279.82%
Arginine ARG (R)134.73%
Threonine THR (T)93.27%
Tryptophan TRP (W)62.18%
Valine VAL (V)217.64%
Tyrosine TYR (Y)134.73%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC1322
HydrogenH2018
NitrogenN368
OxygenO396
SulphurS15

FormulaC1322H2018N368O396S15
Total Number of Atoms:4119


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    52870
Absorption 0.1% (=1 g/l)    1.769,   assuming all pairs of CYS residues form cystines

Ext. coefficient    52370
Absorption 0.1% (=1 g/l)    1.752,   assuming all CYS residues are reduced
Aromaticity:0.105

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 34.58

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[29.09, 32.73, 18.91]

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:72.6909
Grand average of hydropathicity (GRAVY):-0.23