Physicochemical Properties of Peptide



PPepDB ID:PPepDB_5502
Number of amino acids:431
Molecular Weight:48572.98 Da
Theoretical pI:9.33


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)347.89%
Cysteine CYS (C)20.46%
Glutamic Acid GLU (E)143.25%
Aspartic Acid ASP (D)255.8%
Glycine GLY (G)368.35%
Phynylalanine PHE (F)276.26%
Isoleucine ILE (I)266.03%
Histidine HIS (H)102.32%
Lysine LYS (K)255.8%
Methionine MET (M)92.09%
Leucine LEU (L)327.42%
Asparagine ASN (N)235.34%
Glutamine GLN (Q)235.34%
Proline PRO (P)194.41%
Serine SER (S)368.35%
Arginine ARG (R)245.57%
Threonine THR (T)173.94%
Tryptophan TRP (W)102.32%
Valine VAL (V)214.87%
Tyrosine TYR (Y)184.18%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC2195
HydrogenH3338
NitrogenN604
OxygenO627
SulphurS11

FormulaC2195H3338N604O627S11
Total Number of Atoms:6775


Total number of positively charged residues (ARG + LYS):49
Total number of negatively charged residues (ASP + GLU):39
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    81945
Absorption 0.1% (=1 g/l)    1.687,   assuming all pairs of CYS residues form cystines

Ext. coefficient    81820
Absorption 0.1% (=1 g/l)    1.684,   assuming all CYS residues are reduced
Aromaticity:0.128

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 42.21

This indicates that the protein/peptide is unstable
Secondary Structure Fraction [Helix, Turn, Sheet]:[31.09, 26.45, 20.65]

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:74.5011
Grand average of hydropathicity (GRAVY):-0.39