Physicochemical Properties of Peptide



PPepDB ID:PPepDB_4914
Number of amino acids:258
Molecular Weight:29634.24 Da
Theoretical pI:9.21


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)72.71%
Cysteine CYS (C)135.04%
Glutamic Acid GLU (E)103.88%
Aspartic Acid ASP (D)114.26%
Glycine GLY (G)176.59%
Phynylalanine PHE (F)114.26%
Isoleucine ILE (I)145.43%
Histidine HIS (H)72.71%
Lysine LYS (K)207.75%
Methionine MET (M)62.33%
Leucine LEU (L)2710.47%
Asparagine ASN (N)155.81%
Glutamine GLN (Q)103.88%
Proline PRO (P)93.49%
Serine SER (S)249.3%
Arginine ARG (R)155.81%
Threonine THR (T)103.88%
Tryptophan TRP (W)20.78%
Valine VAL (V)145.43%
Tyrosine TYR (Y)166.2%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC1318
HydrogenH2064
NitrogenN364
OxygenO376
SulphurS19

FormulaC1318H2064N364O376S19
Total Number of Atoms:4141


Total number of positively charged residues (ARG + LYS):35
Total number of negatively charged residues (ASP + GLU):21
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    35590
Absorption 0.1% (=1 g/l)    1.201,   assuming all pairs of CYS residues form cystines

Ext. coefficient    34840
Absorption 0.1% (=1 g/l)    1.176,   assuming all CYS residues are reduced
Aromaticity:0.112

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 48.70

This indicates that the protein/peptide is unstable
Secondary Structure Fraction [Helix, Turn, Sheet]:[32.56, 25.19, 19.38]

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:80.4263
Grand average of hydropathicity (GRAVY):-0.34