Physicochemical Properties of Peptide



PPepDB ID:PPepDB_5996
Number of amino acids:251
Molecular Weight:26333.77 Da
Theoretical pI:9.03


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)3915.54%
Cysteine CYS (C)93.59%
Glutamic Acid GLU (E)20.8%
Aspartic Acid ASP (D)93.59%
Glycine GLY (G)3212.75%
Phynylalanine PHE (F)114.38%
Isoleucine ILE (I)62.39%
Histidine HIS (H)20.8%
Lysine LYS (K)41.59%
Methionine MET (M)72.79%
Leucine LEU (L)155.98%
Asparagine ASN (N)103.98%
Glutamine GLN (Q)83.19%
Proline PRO (P)103.98%
Serine SER (S)197.57%
Arginine ARG (R)145.58%
Threonine THR (T)207.97%
Tryptophan TRP (W)93.59%
Valine VAL (V)155.98%
Tyrosine TYR (Y)103.98%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC1165
HydrogenH1764
NitrogenN328
OxygenO341
SulphurS16

FormulaC1165H1764N328O341S16
Total Number of Atoms:3614


Total number of positively charged residues (ARG + LYS):18
Total number of negatively charged residues (ASP + GLU):11
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    64900
Absorption 0.1% (=1 g/l)    2.465,   assuming all pairs of CYS residues form cystines

Ext. coefficient    64400
Absorption 0.1% (=1 g/l)    2.446,   assuming all CYS residues are reduced
Aromaticity:0.120

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 31.47

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[26.29, 28.29, 25.10]

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:65.498
Grand average of hydropathicity (GRAVY):0.07