Physicochemical Properties of Peptide



PPepDB ID:PPepDB_5495
Number of amino acids:262
Molecular Weight:29619.12 Da
Theoretical pI:8.95


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)145.34%
Cysteine CYS (C)124.58%
Glutamic Acid GLU (E)103.82%
Aspartic Acid ASP (D)134.96%
Glycine GLY (G)155.73%
Phynylalanine PHE (F)114.2%
Isoleucine ILE (I)166.11%
Histidine HIS (H)72.67%
Lysine LYS (K)259.54%
Methionine MET (M)72.67%
Leucine LEU (L)238.78%
Asparagine ASN (N)166.11%
Glutamine GLN (Q)83.05%
Proline PRO (P)83.05%
Serine SER (S)2710.31%
Arginine ARG (R)83.05%
Threonine THR (T)103.82%
Tryptophan TRP (W)20.76%
Valine VAL (V)145.34%
Tyrosine TYR (Y)166.11%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC1319
HydrogenH2059
NitrogenN351
OxygenO386
SulphurS19

FormulaC1319H2059N351O386S19
Total Number of Atoms:4134


Total number of positively charged residues (ARG + LYS):33
Total number of negatively charged residues (ASP + GLU):23
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)    1.202,   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:0.111

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 42.96

This indicates that the protein/peptide is unstable
Secondary Structure Fraction [Helix, Turn, Sheet]:[31.30, 25.19, 20.61]

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:78.8931
Grand average of hydropathicity (GRAVY):-0.28