Physicochemical Properties of Peptide



PPepDB ID:PPepDB_4070
Number of amino acids:508
Molecular Weight:55330.6 Da
Theoretical pI:7.78


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)6713.19%
Cysteine CYS (C)71.38%
Glutamic Acid GLU (E)183.54%
Aspartic Acid ASP (D)336.5%
Glycine GLY (G)438.46%
Phynylalanine PHE (F)224.33%
Isoleucine ILE (I)142.76%
Histidine HIS (H)163.15%
Lysine LYS (K)193.74%
Methionine MET (M)112.17%
Leucine LEU (L)438.46%
Asparagine ASN (N)163.15%
Glutamine GLN (Q)122.36%
Proline PRO (P)295.71%
Serine SER (S)418.07%
Arginine ARG (R)336.5%
Threonine THR (T)142.76%
Tryptophan TRP (W)81.57%
Valine VAL (V)387.48%
Tyrosine TYR (Y)244.72%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC2475
HydrogenH3788
NitrogenN694
OxygenO718
SulphurS18

FormulaC2475H3788N694O718S18
Total Number of Atoms:7693


Total number of positively charged residues (ARG + LYS):52
Total number of negatively charged residues (ASP + GLU):51
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    80135
Absorption 0.1% (=1 g/l)    1.448,   assuming all pairs of CYS residues form cystines

Ext. coefficient    79760
Absorption 0.1% (=1 g/l)    1.442,   assuming all CYS residues are reduced
Aromaticity:0.106

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 38.50

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[29.33, 25.39, 27.36]

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:78.6418
Grand average of hydropathicity (GRAVY):-0.17