Physicochemical Properties of Peptide



PPepDB ID:PPepDB_1485
Number of amino acids:208
Molecular Weight:22760.54 Da
Theoretical pI:7.34


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)104.81%
Cysteine CYS (C)167.69%
Glutamic Acid GLU (E)62.88%
Aspartic Acid ASP (D)94.33%
Glycine GLY (G)2913.94%
Phynylalanine PHE (F)115.29%
Isoleucine ILE (I)62.88%
Histidine HIS (H)20.96%
Lysine LYS (K)73.37%
Methionine MET (M)31.44%
Leucine LEU (L)73.37%
Asparagine ASN (N)125.77%
Glutamine GLN (Q)94.33%
Proline PRO (P)199.13%
Serine SER (S)104.81%
Arginine ARG (R)94.33%
Threonine THR (T)188.65%
Tryptophan TRP (W)104.81%
Valine VAL (V)83.85%
Tyrosine TYR (Y)73.37%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC1005
HydrogenH1469
NitrogenN277
OxygenO295
SulphurS19

FormulaC1005H1469N277O295S19
Total Number of Atoms:3065


Total number of positively charged residues (ARG + LYS):16
Total number of negatively charged residues (ASP + GLU):15
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    66430
Absorption 0.1% (=1 g/l)    2.919,   assuming all pairs of CYS residues form cystines

Ext. coefficient    65430
Absorption 0.1% (=1 g/l)    2.875,   assuming all CYS residues are reduced
Aromaticity:0.135

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 44.06

This indicates that the protein/peptide is unstable
Secondary Structure Fraction [Helix, Turn, Sheet]:[23.56, 33.65, 12.50]

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:40.3365
Grand average of hydropathicity (GRAVY):-0.48