Physicochemical Properties of Peptide



PPepDB ID:PPepDB_4866
Number of amino acids:254
Molecular Weight:29360.99 Da
Theoretical pI:9.22


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)114.33%
Cysteine CYS (C)124.72%
Glutamic Acid GLU (E)124.72%
Aspartic Acid ASP (D)103.94%
Glycine GLY (G)135.12%
Phynylalanine PHE (F)103.94%
Isoleucine ILE (I)145.51%
Histidine HIS (H)41.57%
Lysine LYS (K)166.3%
Methionine MET (M)72.76%
Leucine LEU (L)3212.6%
Asparagine ASN (N)166.3%
Glutamine GLN (Q)83.15%
Proline PRO (P)83.15%
Serine SER (S)239.06%
Arginine ARG (R)197.48%
Threonine THR (T)124.72%
Tryptophan TRP (W)20.79%
Valine VAL (V)93.54%
Tyrosine TYR (Y)166.3%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC1302
HydrogenH2057
NitrogenN361
OxygenO374
SulphurS19

FormulaC1302H2057N361O374S19
Total Number of Atoms:4113


Total number of positively charged residues (ARG + LYS):35
Total number of negatively charged residues (ASP + GLU):22
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)    1.212,   assuming all pairs of CYS residues form cystines

Ext. coefficient    34840
Absorption 0.1% (=1 g/l)    1.187,   assuming all CYS residues are reduced
Aromaticity:0.110

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 54.45

This indicates that the protein/peptide is unstable
Secondary Structure Fraction [Helix, Turn, Sheet]:[32.68, 23.62, 24.41]

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:85.2361
Grand average of hydropathicity (GRAVY):-0.30