Physicochemical Properties of Peptide



PPepDB ID:PPepDB_4101
Number of amino acids:416
Molecular Weight:47481.14 Da
Theoretical pI:4.45


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)286.73%
Cysteine CYS (C)40.96%
Glutamic Acid GLU (E)4310.34%
Aspartic Acid ASP (D)5412.98%
Glycine GLY (G)225.29%
Phynylalanine PHE (F)174.09%
Isoleucine ILE (I)204.81%
Histidine HIS (H)71.68%
Lysine LYS (K)4711.3%
Methionine MET (M)40.96%
Leucine LEU (L)225.29%
Asparagine ASN (N)163.85%
Glutamine GLN (Q)92.16%
Proline PRO (P)276.49%
Serine SER (S)266.25%
Arginine ARG (R)61.44%
Threonine THR (T)184.33%
Tryptophan TRP (W)133.13%
Valine VAL (V)184.33%
Tyrosine TYR (Y)153.61%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC2118
HydrogenH3175
NitrogenN533
OxygenO695
SulphurS8

FormulaC2118H3175N533O695S8
Total Number of Atoms:6529


Total number of positively charged residues (ARG + LYS):53
Total number of negatively charged residues (ASP + GLU):97
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    94100
Absorption 0.1% (=1 g/l)    1.982,   assuming all pairs of CYS residues form cystines

Ext. coefficient    93850
Absorption 0.1% (=1 g/l)    1.977,   assuming all CYS residues are reduced
Aromaticity:0.108

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 33.79

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[25.24, 21.88, 23.32]

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:58.6538
Grand average of hydropathicity (GRAVY):-0.99