Physicochemical Properties of Peptide



PPepDB ID:PPepDB_1100
Number of amino acids:134
Molecular Weight:13971.1 Da
Theoretical pI:7.96


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)1410.45%
Cysteine CYS (C)128.96%
Glutamic Acid GLU (E)53.73%
Aspartic Acid ASP (D)42.99%
Glycine GLY (G)118.21%
Phynylalanine PHE (F)10.75%
Isoleucine ILE (I)96.72%
Histidine HIS (H)10.75%
Lysine LYS (K)85.97%
Methionine MET (M)42.99%
Leucine LEU (L)85.97%
Asparagine ASN (N)107.46%
Glutamine GLN (Q)42.99%
Proline PRO (P)32.24%
Serine SER (S)118.21%
Arginine ARG (R)32.24%
Threonine THR (T)128.96%
Tryptophan TRP (W)00%
Valine VAL (V)107.46%
Tyrosine TYR (Y)42.99%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC586
HydrogenH969
NitrogenN167
OxygenO194
SulphurS16

FormulaC586H969N167O194S16
Total Number of Atoms:1932


Total number of positively charged residues (ARG + LYS):11
Total number of negatively charged residues (ASP + GLU):9
Extinction Coefficient:This protein does not contain any Tryptophan residues. Experience shows that this could result in more than 10% error in the computed extinction coefficient.

Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    6710
Absorption 0.1% (=1 g/l)    0.480,   assuming all pairs of CYS residues form cystines

Ext. coefficient    5960
Absorption 0.1% (=1 g/l)    0.427,   assuming all CYS residues are reduced
Aromaticity:0.037

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 27.52

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[23.88, 26.12, 23.13]

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:81.5672
Grand average of hydropathicity (GRAVY):0.14