Physicochemical Properties of Peptide



PPepDB ID:PPepDB_5862
Number of amino acids:282
Molecular Weight:32072.18 Da
Theoretical pI:8.79


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)134.61%
Cysteine CYS (C)62.13%
Glutamic Acid GLU (E)124.26%
Aspartic Acid ASP (D)134.61%
Glycine GLY (G)258.87%
Phynylalanine PHE (F)207.09%
Isoleucine ILE (I)93.19%
Histidine HIS (H)82.84%
Lysine LYS (K)186.38%
Methionine MET (M)72.48%
Leucine LEU (L)186.38%
Asparagine ASN (N)144.96%
Glutamine GLN (Q)134.61%
Proline PRO (P)134.61%
Serine SER (S)258.87%
Arginine ARG (R)124.26%
Threonine THR (T)196.74%
Tryptophan TRP (W)93.19%
Valine VAL (V)165.67%
Tyrosine TYR (Y)124.26%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC1448
HydrogenH2156
NitrogenN388
OxygenO416
SulphurS13

FormulaC1448H2156N388O416S13
Total Number of Atoms:4421


Total number of positively charged residues (ARG + LYS):30
Total number of negatively charged residues (ASP + GLU):25
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    67755
Absorption 0.1% (=1 g/l)    2.113,   assuming all pairs of CYS residues form cystines

Ext. coefficient    67380
Absorption 0.1% (=1 g/l)    2.101,   assuming all CYS residues are reduced
Aromaticity:0.145

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 35.78

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[29.79, 27.30, 17.73]

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:58.4043
Grand average of hydropathicity (GRAVY):-0.48