Physicochemical Properties of Peptide



PPepDB ID:PPepDB_4888
Number of amino acids:669
Molecular Weight:74089.6 Da
Theoretical pI:6.14


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)375.53%
Cysteine CYS (C)182.69%
Glutamic Acid GLU (E)355.23%
Aspartic Acid ASP (D)355.23%
Glycine GLY (G)456.73%
Phynylalanine PHE (F)375.53%
Isoleucine ILE (I)466.88%
Histidine HIS (H)101.49%
Lysine LYS (K)324.78%
Methionine MET (M)162.39%
Leucine LEU (L)558.22%
Asparagine ASN (N)274.04%
Glutamine GLN (Q)202.99%
Proline PRO (P)365.38%
Serine SER (S)6910.31%
Arginine ARG (R)334.93%
Threonine THR (T)477.03%
Tryptophan TRP (W)60.9%
Valine VAL (V)436.43%
Tyrosine TYR (Y)223.29%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC3301
HydrogenH5163
NitrogenN873
OxygenO995
SulphurS34

FormulaC3301H5163N873O995S34
Total Number of Atoms:10366


Total number of positively charged residues (ARG + LYS):65
Total number of negatively charged residues (ASP + GLU):70
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    66905
Absorption 0.1% (=1 g/l)    0.903,   assuming all pairs of CYS residues form cystines

Ext. coefficient    65780
Absorption 0.1% (=1 g/l)    0.888,   assuming all CYS residues are reduced
Aromaticity:0.097

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 44.28

This indicates that the protein/peptide is unstable
Secondary Structure Fraction [Helix, Turn, Sheet]:[31.24, 26.46, 21.38]

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:83.0493
Grand average of hydropathicity (GRAVY):-0.10