Physicochemical Properties of Peptide



PPepDB ID:PPepDB_5432
Number of amino acids:234
Molecular Weight:26293.95 Da
Theoretical pI:5.86


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)229.4%
Cysteine CYS (C)20.85%
Glutamic Acid GLU (E)2811.97%
Aspartic Acid ASP (D)83.42%
Glycine GLY (G)145.98%
Phynylalanine PHE (F)125.13%
Isoleucine ILE (I)62.56%
Histidine HIS (H)125.13%
Lysine LYS (K)218.97%
Methionine MET (M)41.71%
Leucine LEU (L)2611.11%
Asparagine ASN (N)104.27%
Glutamine GLN (Q)93.85%
Proline PRO (P)72.99%
Serine SER (S)145.98%
Arginine ARG (R)72.99%
Threonine THR (T)52.14%
Tryptophan TRP (W)31.28%
Valine VAL (V)218.97%
Tyrosine TYR (Y)31.28%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC1179
HydrogenH1848
NitrogenN322
OxygenO348
SulphurS6

FormulaC1179H1848N322O348S6
Total Number of Atoms:3703


Total number of positively charged residues (ARG + LYS):28
Total number of negatively charged residues (ASP + GLU):36
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    21095
Absorption 0.1% (=1 g/l)    0.802,   assuming all pairs of CYS residues form cystines

Ext. coefficient    20970
Absorption 0.1% (=1 g/l)    0.798,   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 : 27.74

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[30.34, 19.23, 34.19]

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:88.7606
Grand average of hydropathicity (GRAVY):-0.35