Physicochemical Properties of Peptide



PPepDB ID:PPepDB_5210
Number of amino acids:440
Molecular Weight:49455.08 Da
Theoretical pI:8.16


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)368.18%
Cysteine CYS (C)61.36%
Glutamic Acid GLU (E)184.09%
Aspartic Acid ASP (D)235.23%
Glycine GLY (G)368.18%
Phynylalanine PHE (F)132.95%
Isoleucine ILE (I)204.55%
Histidine HIS (H)102.27%
Lysine LYS (K)112.5%
Methionine MET (M)92.05%
Leucine LEU (L)4510.23%
Asparagine ASN (N)204.55%
Glutamine GLN (Q)163.64%
Proline PRO (P)235.23%
Serine SER (S)378.41%
Arginine ARG (R)327.27%
Threonine THR (T)184.09%
Tryptophan TRP (W)143.18%
Valine VAL (V)296.59%
Tyrosine TYR (Y)245.45%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC2223
HydrogenH3397
NitrogenN617
OxygenO638
SulphurS15

FormulaC2223H3397N617O638S15
Total Number of Atoms:6890


Total number of positively charged residues (ARG + LYS):43
Total number of negatively charged residues (ASP + GLU):41
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    113135
Absorption 0.1% (=1 g/l)    2.288,   assuming all pairs of CYS residues form cystines

Ext. coefficient    112760
Absorption 0.1% (=1 g/l)    2.280,   assuming all CYS residues are reduced
Aromaticity:0.116

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 41.77

This indicates that the protein/peptide is unstable
Secondary Structure Fraction [Helix, Turn, Sheet]:[32.95, 26.36, 24.55]

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:84.9092
Grand average of hydropathicity (GRAVY):-0.25