Physicochemical Properties of Peptide



PPepDB ID:PPepDB_5047
Number of amino acids:493
Molecular Weight:54383.67 Da
Theoretical pI:4.96


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)346.9%
Cysteine CYS (C)81.62%
Glutamic Acid GLU (E)326.49%
Aspartic Acid ASP (D)326.49%
Glycine GLY (G)428.52%
Phynylalanine PHE (F)183.65%
Isoleucine ILE (I)204.06%
Histidine HIS (H)132.64%
Lysine LYS (K)265.27%
Methionine MET (M)102.03%
Leucine LEU (L)448.92%
Asparagine ASN (N)295.88%
Glutamine GLN (Q)153.04%
Proline PRO (P)285.68%
Serine SER (S)459.13%
Arginine ARG (R)153.04%
Threonine THR (T)224.46%
Tryptophan TRP (W)71.42%
Valine VAL (V)285.68%
Tyrosine TYR (Y)255.07%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC2414
HydrogenH3677
NitrogenN641
OxygenO758
SulphurS18

FormulaC2414H3677N641O758S18
Total Number of Atoms:7508


Total number of positively charged residues (ARG + LYS):41
Total number of negatively charged residues (ASP + GLU):64
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    76250
Absorption 0.1% (=1 g/l)    1.402,   assuming all pairs of CYS residues form cystines

Ext. coefficient    75750
Absorption 0.1% (=1 g/l)    1.393,   assuming all CYS residues are reduced
Aromaticity:0.101

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 45.09

This indicates that the protein/peptide is unstable
Secondary Structure Fraction [Helix, Turn, Sheet]:[28.80, 29.21, 24.34]

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:73.996
Grand average of hydropathicity (GRAVY):-0.44