Physicochemical Properties of Peptide



PPepDB ID:PPepDB_5981
Number of amino acids:287
Molecular Weight:32076.54 Da
Theoretical pI:5.94


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)124.18%
Cysteine CYS (C)134.53%
Glutamic Acid GLU (E)93.14%
Aspartic Acid ASP (D)155.23%
Glycine GLY (G)113.83%
Phynylalanine PHE (F)165.57%
Isoleucine ILE (I)93.14%
Histidine HIS (H)31.05%
Lysine LYS (K)124.18%
Methionine MET (M)103.48%
Leucine LEU (L)3211.15%
Asparagine ASN (N)248.36%
Glutamine GLN (Q)62.09%
Proline PRO (P)124.18%
Serine SER (S)3211.15%
Arginine ARG (R)103.48%
Threonine THR (T)3010.45%
Tryptophan TRP (W)31.05%
Valine VAL (V)175.92%
Tyrosine TYR (Y)113.83%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC1411
HydrogenH2196
NitrogenN368
OxygenO439
SulphurS23

FormulaC1411H2196N368O439S23
Total Number of Atoms:4437


Total number of positively charged residues (ARG + LYS):22
Total number of negatively charged residues (ASP + GLU):24
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    33640
Absorption 0.1% (=1 g/l)    1.049,   assuming all pairs of CYS residues form cystines

Ext. coefficient    32890
Absorption 0.1% (=1 g/l)    1.025,   assuming all CYS residues are reduced
Aromaticity:0.105

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 36.55

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[30.66, 27.53, 21.95]

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:77.0731
Grand average of hydropathicity (GRAVY):-0.09