Physicochemical Properties of Peptide



PPepDB ID:PPepDB_1183
Number of amino acids:255
Molecular Weight:27137.05 Da
Theoretical pI:8.29


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)239.02%
Cysteine CYS (C)166.27%
Glutamic Acid GLU (E)72.75%
Aspartic Acid ASP (D)135.1%
Glycine GLY (G)259.8%
Phynylalanine PHE (F)135.1%
Isoleucine ILE (I)114.31%
Histidine HIS (H)20.78%
Lysine LYS (K)124.71%
Methionine MET (M)20.78%
Leucine LEU (L)249.41%
Asparagine ASN (N)72.75%
Glutamine GLN (Q)31.18%
Proline PRO (P)176.67%
Serine SER (S)2710.59%
Arginine ARG (R)124.71%
Threonine THR (T)176.67%
Tryptophan TRP (W)31.18%
Valine VAL (V)114.31%
Tyrosine TYR (Y)103.92%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC1202
HydrogenH1866
NitrogenN320
OxygenO360
SulphurS18

FormulaC1202H1866N320O360S18
Total Number of Atoms:3766


Total number of positively charged residues (ARG + LYS):24
Total number of negatively charged residues (ASP + GLU):20
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    32400
Absorption 0.1% (=1 g/l)    1.194,   assuming all pairs of CYS residues form cystines

Ext. coefficient    31400
Absorption 0.1% (=1 g/l)    1.157,   assuming all CYS residues are reduced
Aromaticity:0.102

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 35.10

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[28.24, 29.80, 21.96]

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:75.0588
Grand average of hydropathicity (GRAVY):0.04