Physicochemical Properties of Peptide



PPepDB ID:PPepDB_4808
Number of amino acids:280
Molecular Weight:30219.48 Da
Theoretical pI:8.91


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)3111.07%
Cysteine CYS (C)82.86%
Glutamic Acid GLU (E)10.36%
Aspartic Acid ASP (D)155.36%
Glycine GLY (G)279.64%
Phynylalanine PHE (F)145%
Isoleucine ILE (I)103.57%
Histidine HIS (H)41.43%
Lysine LYS (K)103.57%
Methionine MET (M)93.21%
Leucine LEU (L)196.79%
Asparagine ASN (N)155.36%
Glutamine GLN (Q)93.21%
Proline PRO (P)186.43%
Serine SER (S)176.07%
Arginine ARG (R)124.29%
Threonine THR (T)258.93%
Tryptophan TRP (W)93.21%
Valine VAL (V)186.43%
Tyrosine TYR (Y)93.21%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC1353
HydrogenH2059
NitrogenN367
OxygenO388
SulphurS17

FormulaC1353H2059N367O388S17
Total Number of Atoms:4184


Total number of positively charged residues (ARG + LYS):22
Total number of negatively charged residues (ASP + GLU):16
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    63410
Absorption 0.1% (=1 g/l)    2.098,   assuming all pairs of CYS residues form cystines

Ext. coefficient    62910
Absorption 0.1% (=1 g/l)    2.082,   assuming all CYS residues are reduced
Aromaticity:0.114

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 28.22

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[28.21, 27.50, 21.43]

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:70.1071
Grand average of hydropathicity (GRAVY):-0.04