Physicochemical Properties of Peptide



PPepDB ID:PPepDB_4132
Number of amino acids:456
Molecular Weight:48037.21 Da
Theoretical pI:5.29


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)6213.6%
Cysteine CYS (C)40.88%
Glutamic Acid GLU (E)327.02%
Aspartic Acid ASP (D)337.24%
Glycine GLY (G)5010.96%
Phynylalanine PHE (F)91.97%
Isoleucine ILE (I)112.41%
Histidine HIS (H)51.1%
Lysine LYS (K)194.17%
Methionine MET (M)143.07%
Leucine LEU (L)4810.53%
Asparagine ASN (N)71.54%
Glutamine GLN (Q)153.29%
Proline PRO (P)275.92%
Serine SER (S)347.46%
Arginine ARG (R)367.89%
Threonine THR (T)183.95%
Tryptophan TRP (W)40.88%
Valine VAL (V)255.48%
Tyrosine TYR (Y)30.66%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC2063
HydrogenH3361
NitrogenN619
OxygenO664
SulphurS18

FormulaC2063H3361N619O664S18
Total Number of Atoms:6725


Total number of positively charged residues (ARG + LYS):55
Total number of negatively charged residues (ASP + GLU):65
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    26720
Absorption 0.1% (=1 g/l)    0.556,   assuming all pairs of CYS residues form cystines

Ext. coefficient    26470
Absorption 0.1% (=1 g/l)    0.551,   assuming all CYS residues are reduced
Aromaticity:0.035

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 55.34

This indicates that the protein/peptide is unstable
Secondary Structure Fraction [Helix, Turn, Sheet]:[21.93, 25.88, 34.21]

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:79.9561
Grand average of hydropathicity (GRAVY):-0.34