Physicochemical Properties of Peptide



PPepDB ID:PPepDB_4092
Number of amino acids:661
Molecular Weight:72601.72 Da
Theoretical pI:7.81


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)426.35%
Cysteine CYS (C)203.03%
Glutamic Acid GLU (E)182.72%
Aspartic Acid ASP (D)395.9%
Glycine GLY (G)385.75%
Phynylalanine PHE (F)304.54%
Isoleucine ILE (I)304.54%
Histidine HIS (H)81.21%
Lysine LYS (K)304.54%
Methionine MET (M)152.27%
Leucine LEU (L)548.17%
Asparagine ASN (N)446.66%
Glutamine GLN (Q)243.63%
Proline PRO (P)609.08%
Serine SER (S)639.53%
Arginine ARG (R)294.39%
Threonine THR (T)395.9%
Tryptophan TRP (W)111.66%
Valine VAL (V)497.41%
Tyrosine TYR (Y)182.72%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC3228
HydrogenH5017
NitrogenN873
OxygenO964
SulphurS35

FormulaC3228H5017N873O964S35
Total Number of Atoms:10117


Total number of positively charged residues (ARG + LYS):59
Total number of negatively charged residues (ASP + GLU):57
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    88570
Absorption 0.1% (=1 g/l)    1.220,   assuming all pairs of CYS residues form cystines

Ext. coefficient    87320
Absorption 0.1% (=1 g/l)    1.203,   assuming all CYS residues are reduced
Aromaticity:0.089

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 40.93

This indicates that the protein/peptide is unstable
Secondary Structure Fraction [Helix, Turn, Sheet]:[29.05, 31.01, 19.52]

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:77.413
Grand average of hydropathicity (GRAVY):-0.23