Physicochemical Properties of Peptide



PPepDB ID:PPepDB_4627
Number of amino acids:1143
Molecular Weight:125675.78 Da
Theoretical pI:6.58


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)474.11%
Cysteine CYS (C)221.92%
Glutamic Acid GLU (E)675.86%
Aspartic Acid ASP (D)443.85%
Glycine GLY (G)907.87%
Phynylalanine PHE (F)484.2%
Isoleucine ILE (I)807%
Histidine HIS (H)181.57%
Lysine LYS (K)544.72%
Methionine MET (M)191.66%
Leucine LEU (L)15813.82%
Asparagine ASN (N)776.74%
Glutamine GLN (Q)403.5%
Proline PRO (P)574.99%
Serine SER (S)12911.29%
Arginine ARG (R)534.64%
Threonine THR (T)595.16%
Tryptophan TRP (W)110.96%
Valine VAL (V)484.2%
Tyrosine TYR (Y)221.92%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC5578
HydrogenH8916
NitrogenN1520
OxygenO1693
SulphurS41

FormulaC5578H8916N1520O1693S41
Total Number of Atoms:17748


Total number of positively charged residues (ARG + LYS):107
Total number of negatively charged residues (ASP + GLU):111
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    94655
Absorption 0.1% (=1 g/l)    0.753,   assuming all pairs of CYS residues form cystines

Ext. coefficient    93280
Absorption 0.1% (=1 g/l)    0.742,   assuming all CYS residues are reduced
Aromaticity:0.071

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 39.33

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[32.11, 30.88, 25.46]

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:97.498
Grand average of hydropathicity (GRAVY):-0.12