Physicochemical Properties of Peptide



PPepDB ID:PPepDB_4454
Number of amino acids:731
Molecular Weight:80740.52 Da
Theoretical pI:7.45


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)293.97%
Cysteine CYS (C)263.56%
Glutamic Acid GLU (E)486.57%
Aspartic Acid ASP (D)375.06%
Glycine GLY (G)638.62%
Phynylalanine PHE (F)253.42%
Isoleucine ILE (I)506.84%
Histidine HIS (H)91.23%
Lysine LYS (K)476.43%
Methionine MET (M)172.33%
Leucine LEU (L)658.89%
Asparagine ASN (N)354.79%
Glutamine GLN (Q)172.33%
Proline PRO (P)324.38%
Serine SER (S)669.03%
Arginine ARG (R)395.34%
Threonine THR (T)435.88%
Tryptophan TRP (W)30.41%
Valine VAL (V)527.11%
Tyrosine TYR (Y)283.83%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC3549
HydrogenH5676
NitrogenN968
OxygenO1091
SulphurS43

FormulaC3549H5676N968O1091S43
Total Number of Atoms:11327


Total number of positively charged residues (ARG + LYS):86
Total number of negatively charged residues (ASP + GLU):85
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    59845
Absorption 0.1% (=1 g/l)    0.741,   assuming all pairs of CYS residues form cystines

Ext. coefficient    58220
Absorption 0.1% (=1 g/l)    0.721,   assuming all CYS residues are reduced
Aromaticity:0.077

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 46.45

This indicates that the protein/peptide is unstable
Secondary Structure Fraction [Helix, Turn, Sheet]:[30.51, 26.81, 21.75]

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:85.9508
Grand average of hydropathicity (GRAVY):-0.21