Physicochemical Properties of Peptide



PPepDB ID:PPepDB_1316
Number of amino acids:247
Molecular Weight:26310.64 Da
Theoretical pI:5.41


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)228.91%
Cysteine CYS (C)187.29%
Glutamic Acid GLU (E)72.83%
Aspartic Acid ASP (D)135.26%
Glycine GLY (G)239.31%
Phynylalanine PHE (F)145.67%
Isoleucine ILE (I)93.64%
Histidine HIS (H)10.4%
Lysine LYS (K)156.07%
Methionine MET (M)52.02%
Leucine LEU (L)83.24%
Asparagine ASN (N)135.26%
Glutamine GLN (Q)124.86%
Proline PRO (P)208.1%
Serine SER (S)218.5%
Arginine ARG (R)31.21%
Threonine THR (T)187.29%
Tryptophan TRP (W)31.21%
Valine VAL (V)124.86%
Tyrosine TYR (Y)104.05%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC1150
HydrogenH1739
NitrogenN301
OxygenO362
SulphurS23

FormulaC1150H1739N301O362S23
Total Number of Atoms:3575


Total number of positively charged residues (ARG + LYS):18
Total number of negatively charged residues (ASP + GLU):20
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    32525
Absorption 0.1% (=1 g/l)    1.236,   assuming all pairs of CYS residues form cystines

Ext. coefficient    31400
Absorption 0.1% (=1 g/l)    1.193,   assuming all CYS residues are reduced
Aromaticity:0.109

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 38.58

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[22.67, 31.17, 17.00]

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:49.8381
Grand average of hydropathicity (GRAVY):-0.26