Physicochemical Properties of Peptide



PPepDB ID:PPepDB_5007
Number of amino acids:404
Molecular Weight:44297.91 Da
Theoretical pI:8.52


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)235.69%
Cysteine CYS (C)92.23%
Glutamic Acid GLU (E)102.48%
Aspartic Acid ASP (D)235.69%
Glycine GLY (G)409.9%
Phynylalanine PHE (F)143.47%
Isoleucine ILE (I)317.67%
Histidine HIS (H)194.7%
Lysine LYS (K)174.21%
Methionine MET (M)92.23%
Leucine LEU (L)286.93%
Asparagine ASN (N)276.68%
Glutamine GLN (Q)143.47%
Proline PRO (P)174.21%
Serine SER (S)4210.4%
Arginine ARG (R)204.95%
Threonine THR (T)204.95%
Tryptophan TRP (W)81.98%
Valine VAL (V)225.45%
Tyrosine TYR (Y)112.72%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC1945
HydrogenH3020
NitrogenN568
OxygenO585
SulphurS18

FormulaC1945H3020N568O585S18
Total Number of Atoms:6136


Total number of positively charged residues (ARG + LYS):37
Total number of negatively charged residues (ASP + GLU):33
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    60890
Absorption 0.1% (=1 g/l)    1.375,   assuming all pairs of CYS residues form cystines

Ext. coefficient    60390
Absorption 0.1% (=1 g/l)    1.363,   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 : 40.98

This indicates that the protein/peptide is unstable
Secondary Structure Fraction [Helix, Turn, Sheet]:[28.22, 31.19, 17.33]

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:78.4406
Grand average of hydropathicity (GRAVY):-0.32