Physicochemical Properties of Peptide



PPepDB ID:PPepDB_2181
Number of amino acids:93
Molecular Weight:10844.78 Da
Theoretical pI:11.77


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)66.45%
Cysteine CYS (C)88.6%
Glutamic Acid GLU (E)00%
Aspartic Acid ASP (D)22.15%
Glycine GLY (G)55.38%
Phynylalanine PHE (F)44.3%
Isoleucine ILE (I)66.45%
Histidine HIS (H)00%
Lysine LYS (K)00%
Methionine MET (M)00%
Leucine LEU (L)66.45%
Asparagine ASN (N)1111.83%
Glutamine GLN (Q)33.23%
Proline PRO (P)99.68%
Serine SER (S)00%
Arginine ARG (R)1920.43%
Threonine THR (T)33.23%
Tryptophan TRP (W)22.15%
Valine VAL (V)88.6%
Tyrosine TYR (Y)11.08%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC469
HydrogenH768
NitrogenN166
OxygenO116
SulphurS8

FormulaC469H768N166O116S8
Total Number of Atoms:1527


Total number of positively charged residues (ARG + LYS):19
Total number of negatively charged residues (ASP + GLU):2
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    12990
Absorption 0.1% (=1 g/l)    1.198,   assuming all pairs of CYS residues form cystines

Ext. coefficient    12490
Absorption 0.1% (=1 g/l)    1.152,   assuming all CYS residues are reduced
Aromaticity:0.075

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 50.84

This indicates that the protein/peptide is unstable
Secondary Structure Fraction [Helix, Turn, Sheet]:[29.03, 26.88, 12.90]

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:81.7204
Grand average of hydropathicity (GRAVY):-0.41