Physicochemical Properties of Peptide



PPepDB ID:PPepDB_4009
Number of amino acids:377
Molecular Weight:41627.84 Da
Theoretical pI:6.92


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)369.55%
Cysteine CYS (C)82.12%
Glutamic Acid GLU (E)195.04%
Aspartic Acid ASP (D)153.98%
Glycine GLY (G)318.22%
Phynylalanine PHE (F)112.92%
Isoleucine ILE (I)153.98%
Histidine HIS (H)215.57%
Lysine LYS (K)153.98%
Methionine MET (M)71.86%
Leucine LEU (L)338.75%
Asparagine ASN (N)236.1%
Glutamine GLN (Q)184.77%
Proline PRO (P)205.31%
Serine SER (S)205.31%
Arginine ARG (R)174.51%
Threonine THR (T)277.16%
Tryptophan TRP (W)71.86%
Valine VAL (V)215.57%
Tyrosine TYR (Y)133.45%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC1838
HydrogenH2831
NitrogenN533
OxygenO547
SulphurS15

FormulaC1838H2831N533O547S15
Total Number of Atoms:5764


Total number of positively charged residues (ARG + LYS):32
Total number of negatively charged residues (ASP + GLU):34
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    58370
Absorption 0.1% (=1 g/l)    1.402,   assuming all pairs of CYS residues form cystines

Ext. coefficient    57870
Absorption 0.1% (=1 g/l)    1.390,   assuming all CYS residues are reduced
Aromaticity:0.082

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 30.24

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[26.53, 24.93, 25.20]

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:75.3581
Grand average of hydropathicity (GRAVY):-0.42