Physicochemical Properties of Peptide



PPepDB ID:PPepDB_5151
Number of amino acids:346
Molecular Weight:38085.6 Da
Theoretical pI:7.69


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)277.8%
Cysteine CYS (C)82.31%
Glutamic Acid GLU (E)82.31%
Aspartic Acid ASP (D)308.67%
Glycine GLY (G)216.07%
Phynylalanine PHE (F)216.07%
Isoleucine ILE (I)164.62%
Histidine HIS (H)51.45%
Lysine LYS (K)205.78%
Methionine MET (M)92.6%
Leucine LEU (L)4111.85%
Asparagine ASN (N)185.2%
Glutamine GLN (Q)123.47%
Proline PRO (P)154.34%
Serine SER (S)329.25%
Arginine ARG (R)195.49%
Threonine THR (T)174.91%
Tryptophan TRP (W)10.29%
Valine VAL (V)205.78%
Tyrosine TYR (Y)61.73%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC1683
HydrogenH2678
NitrogenN464
OxygenO508
SulphurS17

FormulaC1683H2678N464O508S17
Total Number of Atoms:5350


Total number of positively charged residues (ARG + LYS):39
Total number of negatively charged residues (ASP + GLU):38
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    14940
Absorption 0.1% (=1 g/l)    0.392,   assuming all pairs of CYS residues form cystines

Ext. coefficient    14440
Absorption 0.1% (=1 g/l)    0.379,   assuming all CYS residues are reduced
Aromaticity:0.081

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 40.46

This indicates that the protein/peptide is unstable
Secondary Structure Fraction [Helix, Turn, Sheet]:[30.35, 24.86, 24.57]

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:88.815
Grand average of hydropathicity (GRAVY):-0.12