Physicochemical Properties of Peptide



PPepDB ID:PPepDB_4429
Number of amino acids:313
Molecular Weight:33751.96 Da
Theoretical pI:5.77


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)3912.46%
Cysteine CYS (C)51.6%
Glutamic Acid GLU (E)206.39%
Aspartic Acid ASP (D)144.47%
Glycine GLY (G)237.35%
Phynylalanine PHE (F)185.75%
Isoleucine ILE (I)196.07%
Histidine HIS (H)30.96%
Lysine LYS (K)196.07%
Methionine MET (M)30.96%
Leucine LEU (L)3410.86%
Asparagine ASN (N)92.88%
Glutamine GLN (Q)72.24%
Proline PRO (P)247.67%
Serine SER (S)237.35%
Arginine ARG (R)123.83%
Threonine THR (T)103.19%
Tryptophan TRP (W)30.96%
Valine VAL (V)196.07%
Tyrosine TYR (Y)92.88%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC1542
HydrogenH2411
NitrogenN393
OxygenO440
SulphurS8

FormulaC1542H2411N393O440S8
Total Number of Atoms:4794


Total number of positively charged residues (ARG + LYS):31
Total number of negatively charged residues (ASP + GLU):34
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    30160
Absorption 0.1% (=1 g/l)    0.894,   assuming all pairs of CYS residues form cystines

Ext. coefficient    29910
Absorption 0.1% (=1 g/l)    0.886,   assuming all CYS residues are reduced
Aromaticity:0.096

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 35.97

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[32.59, 25.24, 30.67]

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:96.1022
Grand average of hydropathicity (GRAVY):0.11