Physicochemical Properties of Peptide



PPepDB ID:PPepDB_5218
Number of amino acids:458
Molecular Weight:50408.55 Da
Theoretical pI:6.22


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)357.64%
Cysteine CYS (C)20.44%
Glutamic Acid GLU (E)326.99%
Aspartic Acid ASP (D)255.46%
Glycine GLY (G)357.64%
Phynylalanine PHE (F)183.93%
Isoleucine ILE (I)245.24%
Histidine HIS (H)122.62%
Lysine LYS (K)255.46%
Methionine MET (M)91.97%
Leucine LEU (L)5010.92%
Asparagine ASN (N)163.49%
Glutamine GLN (Q)183.93%
Proline PRO (P)337.21%
Serine SER (S)357.64%
Arginine ARG (R)275.9%
Threonine THR (T)173.71%
Tryptophan TRP (W)10.22%
Valine VAL (V)326.99%
Tyrosine TYR (Y)122.62%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC2247
HydrogenH3577
NitrogenN623
OxygenO671
SulphurS11

FormulaC2247H3577N623O671S11
Total Number of Atoms:7129


Total number of positively charged residues (ARG + LYS):52
Total number of negatively charged residues (ASP + GLU):57
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    23505
Absorption 0.1% (=1 g/l)    0.466,   assuming all pairs of CYS residues form cystines

Ext. coefficient    23380
Absorption 0.1% (=1 g/l)    0.464,   assuming all CYS residues are reduced
Aromaticity:0.068

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 51.18

This indicates that the protein/peptide is unstable
Secondary Structure Fraction [Helix, Turn, Sheet]:[29.91, 25.98, 27.51]

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:90.9169
Grand average of hydropathicity (GRAVY):-0.29