Physicochemical Properties of Peptide



PPepDB ID:PPepDB_4591
Number of amino acids:380
Molecular Weight:42172.19 Da
Theoretical pI:6.36


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)348.95%
Cysteine CYS (C)82.11%
Glutamic Acid GLU (E)225.79%
Aspartic Acid ASP (D)184.74%
Glycine GLY (G)307.89%
Phynylalanine PHE (F)123.16%
Isoleucine ILE (I)153.95%
Histidine HIS (H)236.05%
Lysine LYS (K)153.95%
Methionine MET (M)71.84%
Leucine LEU (L)318.16%
Asparagine ASN (N)215.53%
Glutamine GLN (Q)164.21%
Proline PRO (P)205.26%
Serine SER (S)205.26%
Arginine ARG (R)184.74%
Threonine THR (T)328.42%
Tryptophan TRP (W)71.84%
Valine VAL (V)195%
Tyrosine TYR (Y)123.16%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC1855
HydrogenH2847
NitrogenN539
OxygenO562
SulphurS15

FormulaC1855H2847N539O562S15
Total Number of Atoms:5818


Total number of positively charged residues (ARG + LYS):33
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    56880
Absorption 0.1% (=1 g/l)    1.349,   assuming all pairs of CYS residues form cystines

Ext. coefficient    56380
Absorption 0.1% (=1 g/l)    1.337,   assuming all CYS residues are reduced
Aromaticity:0.082

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 30.45

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[25.26, 23.95, 24.74]

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:70.6579
Grand average of hydropathicity (GRAVY):-0.51