Physicochemical Properties of Peptide



PPepDB ID:PPepDB_5769
Number of amino acids:215
Molecular Weight:24777.74 Da
Theoretical pI:8.75


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)83.72%
Cysteine CYS (C)104.65%
Glutamic Acid GLU (E)73.26%
Aspartic Acid ASP (D)104.65%
Glycine GLY (G)125.58%
Phynylalanine PHE (F)146.51%
Isoleucine ILE (I)167.44%
Histidine HIS (H)41.86%
Lysine LYS (K)177.91%
Methionine MET (M)62.79%
Leucine LEU (L)177.91%
Asparagine ASN (N)167.44%
Glutamine GLN (Q)83.72%
Proline PRO (P)125.58%
Serine SER (S)94.19%
Arginine ARG (R)62.79%
Threonine THR (T)188.37%
Tryptophan TRP (W)52.33%
Valine VAL (V)104.65%
Tyrosine TYR (Y)104.65%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC1127
HydrogenH1719
NitrogenN287
OxygenO311
SulphurS16

FormulaC1127H1719N287O311S16
Total Number of Atoms:3460


Total number of positively charged residues (ARG + LYS):23
Total number of negatively charged residues (ASP + GLU):17
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    43025
Absorption 0.1% (=1 g/l)    1.736,   assuming all pairs of CYS residues form cystines

Ext. coefficient    42400
Absorption 0.1% (=1 g/l)    1.711,   assuming all CYS residues are reduced
Aromaticity:0.135

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 30.41

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[33.49, 22.79, 17.67]

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:77.0698
Grand average of hydropathicity (GRAVY):-0.20