Physicochemical Properties of Peptide



PPepDB ID:PPepDB_5633
Number of amino acids:263
Molecular Weight:28036.62 Da
Theoretical pI:9.4


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)3814.45%
Cysteine CYS (C)83.04%
Glutamic Acid GLU (E)41.52%
Aspartic Acid ASP (D)114.18%
Glycine GLY (G)3312.55%
Phynylalanine PHE (F)155.7%
Isoleucine ILE (I)31.14%
Histidine HIS (H)20.76%
Lysine LYS (K)10.38%
Methionine MET (M)72.66%
Leucine LEU (L)124.56%
Asparagine ASN (N)72.66%
Glutamine GLN (Q)93.42%
Proline PRO (P)124.56%
Serine SER (S)186.84%
Arginine ARG (R)238.75%
Threonine THR (T)207.6%
Tryptophan TRP (W)83.04%
Valine VAL (V)228.37%
Tyrosine TYR (Y)103.8%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC1239
HydrogenH1875
NitrogenN361
OxygenO358
SulphurS15

FormulaC1239H1875N361O358S15
Total Number of Atoms:3848


Total number of positively charged residues (ARG + LYS):24
Total number of negatively charged residues (ASP + GLU):15
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    59400
Absorption 0.1% (=1 g/l)    2.119,   assuming all pairs of CYS residues form cystines

Ext. coefficient    58900
Absorption 0.1% (=1 g/l)    2.101,   assuming all CYS residues are reduced
Aromaticity:0.125

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 39.30

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[26.62, 26.62, 23.19]

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:60.9506
Grand average of hydropathicity (GRAVY):-0.03