Physicochemical Properties of Peptide



PPepDB ID:PPepDB_4199
Number of amino acids:899
Molecular Weight:98649.75 Da
Theoretical pI:9.34


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)606.67%
Cysteine CYS (C)30.33%
Glutamic Acid GLU (E)586.45%
Aspartic Acid ASP (D)414.56%
Glycine GLY (G)495.45%
Phynylalanine PHE (F)455.01%
Isoleucine ILE (I)252.78%
Histidine HIS (H)151.67%
Lysine LYS (K)626.9%
Methionine MET (M)182%
Leucine LEU (L)778.57%
Asparagine ASN (N)313.45%
Glutamine GLN (Q)323.56%
Proline PRO (P)9610.68%
Serine SER (S)10211.35%
Arginine ARG (R)546.01%
Threonine THR (T)647.12%
Tryptophan TRP (W)20.22%
Valine VAL (V)505.56%
Tyrosine TYR (Y)151.67%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC4367
HydrogenH6938
NitrogenN1218
OxygenO1342
SulphurS21

FormulaC4367H6938N1218O1342S21
Total Number of Atoms:13886


Total number of positively charged residues (ARG + LYS):116
Total number of negatively charged residues (ASP + GLU):99
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    33475
Absorption 0.1% (=1 g/l)    0.339,   assuming all pairs of CYS residues form cystines

Ext. coefficient    33350
Absorption 0.1% (=1 g/l)    0.338,   assuming all CYS residues are reduced
Aromaticity:0.069

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 54.92

This indicates that the protein/peptide is unstable
Secondary Structure Fraction [Helix, Turn, Sheet]:[23.80, 30.92, 23.69]

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:67.0523
Grand average of hydropathicity (GRAVY):-0.59