Physicochemical Properties of Peptide



PPepDB ID:PPepDB_5431
Number of amino acids:97
Molecular Weight:11119.07 Da
Theoretical pI:6.78


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)33.09%
Cysteine CYS (C)99.28%
Glutamic Acid GLU (E)44.12%
Aspartic Acid ASP (D)55.15%
Glycine GLY (G)22.06%
Phynylalanine PHE (F)66.19%
Isoleucine ILE (I)66.19%
Histidine HIS (H)11.03%
Lysine LYS (K)33.09%
Methionine MET (M)66.19%
Leucine LEU (L)88.25%
Asparagine ASN (N)55.15%
Glutamine GLN (Q)33.09%
Proline PRO (P)77.22%
Serine SER (S)1010.31%
Arginine ARG (R)66.19%
Threonine THR (T)44.12%
Tryptophan TRP (W)22.06%
Valine VAL (V)66.19%
Tyrosine TYR (Y)11.03%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC485
HydrogenH762
NitrogenN130
OxygenO139
SulphurS15

FormulaC485H762N130O139S15
Total Number of Atoms:1531


Total number of positively charged residues (ARG + LYS):9
Total number of negatively charged residues (ASP + GLU):9
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    12990
Absorption 0.1% (=1 g/l)    1.168,   assuming all pairs of CYS residues form cystines

Ext. coefficient    12490
Absorption 0.1% (=1 g/l)    1.123,   assuming all CYS residues are reduced
Aromaticity:0.093

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 45.86

This indicates that the protein/peptide is unstable
Secondary Structure Fraction [Helix, Turn, Sheet]:[29.90, 24.74, 21.65]

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:77.3196
Grand average of hydropathicity (GRAVY):0.12