Physicochemical Properties of Peptide



PPepDB ID:PPepDB_4291
Number of amino acids:808
Molecular Weight:90071.8 Da
Theoretical pI:5.9


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)577.05%
Cysteine CYS (C)222.72%
Glutamic Acid GLU (E)465.69%
Aspartic Acid ASP (D)384.7%
Glycine GLY (G)749.16%
Phynylalanine PHE (F)354.33%
Isoleucine ILE (I)374.58%
Histidine HIS (H)202.48%
Lysine LYS (K)384.7%
Methionine MET (M)222.72%
Leucine LEU (L)536.56%
Asparagine ASN (N)506.19%
Glutamine GLN (Q)253.09%
Proline PRO (P)374.58%
Serine SER (S)506.19%
Arginine ARG (R)334.08%
Threonine THR (T)506.19%
Tryptophan TRP (W)202.48%
Valine VAL (V)617.55%
Tyrosine TYR (Y)404.95%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC4023
HydrogenH6094
NitrogenN1080
OxygenO1192
SulphurS44

FormulaC4023H6094N1080O1192S44
Total Number of Atoms:12433


Total number of positively charged residues (ARG + LYS):71
Total number of negatively charged residues (ASP + GLU):84
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    170975
Absorption 0.1% (=1 g/l)    1.898,   assuming all pairs of CYS residues form cystines

Ext. coefficient    169600
Absorption 0.1% (=1 g/l)    1.883,   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 : 37.20

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[30.45, 26.11, 22.03]

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:72.3886
Grand average of hydropathicity (GRAVY):-0.28