Physicochemical Properties of Peptide



PPepDB ID:PPepDB_4345
Number of amino acids:386
Molecular Weight:42628.48 Da
Theoretical pI:5.38


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)379.59%
Cysteine CYS (C)20.52%
Glutamic Acid GLU (E)246.22%
Aspartic Acid ASP (D)205.18%
Glycine GLY (G)235.96%
Phynylalanine PHE (F)194.92%
Isoleucine ILE (I)215.44%
Histidine HIS (H)71.81%
Lysine LYS (K)246.22%
Methionine MET (M)112.85%
Leucine LEU (L)4010.36%
Asparagine ASN (N)184.66%
Glutamine GLN (Q)133.37%
Proline PRO (P)164.15%
Serine SER (S)297.51%
Arginine ARG (R)112.85%
Threonine THR (T)338.55%
Tryptophan TRP (W)20.52%
Valine VAL (V)194.92%
Tyrosine TYR (Y)174.4%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC1913
HydrogenH2988
NitrogenN490
OxygenO585
SulphurS13

FormulaC1913H2988N490O585S13
Total Number of Atoms:5989


Total number of positively charged residues (ARG + LYS):35
Total number of negatively charged residues (ASP + GLU):44
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    36455
Absorption 0.1% (=1 g/l)    0.855,   assuming all pairs of CYS residues form cystines

Ext. coefficient    36330
Absorption 0.1% (=1 g/l)    0.852,   assuming all CYS residues are reduced
Aromaticity:0.098

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 38.77

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[30.57, 22.28, 29.02]

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:85.4922
Grand average of hydropathicity (GRAVY):-0.16